@TechReport{krivanek04radiance,
  author =   {Jaroslav K\v{r}iv\'anek and Pascal Gautron and Sumanta Pattanaik and Kadi Bouatouch},
  title =    {Radiance Caching for Efficient Global Illumination Computation},
  institution = {IRISA},
  address = {Rennes, France},
  year =     {2004},
  number =   {1623},
  month =    {June}
}

@InBook{weisstein04world,
  author = {Eric Weisstein},
  title = {World of Mathematics: A Wolfram Web Resource},
  publisher = {http://mathworld.wolfram.com/\\LegendrePolynomial.html},
  year = {2004}
}

@TechReport{shirley94notes,
  author =   {Peter Shirley and Kenneth Chiu},
  title =    {Notes on Adaptive Quadrature on the Hemisphere},
  institution =  {Dept. of Computer Science, Indiana University},
  year =     {1994},
  number =   {TR-411},
  month =    {July}
}

@incollection{serpaggi01adaptive,
    author = "Xavier Serpaggi and Bernard P{\'{e}}roche",
    title = "An Adaptive Method for Indirect Illumination Using Light Vectors",
    booktitle = "Com{\-}pu{\-}ter Graphics Forum (EUROGRAPHICS 2001 Proceedings)",
    publisher = "Blackwell Publishing",
    editor = "A. Chalmers and T.-M. Rhyne",
    volume = "20(3)",
    pages = "278--287",
    year = "2001",
    url = "citeseer.nj.nec.com/serpaggi01adaptive.html"
}

@Book{jensen01realistic,
  author =   {Henrik Wann Jensen},
  title =    {Realistic Image Synthesis Using Photon Mapping},
  publisher = {AK Peters},
  year =     {2001},
  month =    {July}
}

@InProceedings{ward92irradiance,
  author =   {Gregory J. Ward and Paul S. Heckbert},
  title =    {Irradiance Gradients},
  booktitle =  {Proceedings of 2nd Eurographics Workshop on Rendering},
  year =     {1992},
  address =      {Bristol}
}

@inproceedings{ward88ray,
 author = {Gregory J. Ward and Francis M. Rubinstein and Robert D. Clear},
 title = {A ray tracing solution for diffuse interreflection},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1988},
 isbn = {0-89791-275-6},
 pages = {85--92},
 doi = {http://doi.acm.org/10.1145/54852.378490},
 publisher = {ACM Press},
}

@article{ zaninetti98vector,
    author = "Jacques Zaninetti and Xavier Serpaggi and Bernard P{\'e}roche",
    title = "A Vector Approach for Global Illumination in Ray Tracing",
    journal = "Com{\-}pu{\-}ter Graphics Forum (EUROGRAPHICS '98 Proceedings)",
    volume = "17",
    number = "3",
    year = "1998",
    url = "citeseer.nj.nec.com/zaninetti98vector.html"
}

@inproceedings{581934,
 author = {Jan Kautz and Peter-Pike Sloan and John Snyder},
 title = {Fast, arbitrary {BRDF} shading for low-frequency lighting using spherical harmonics},
 booktitle = {Proceedings of the 13th Eurographics workshop on Rendering},
 year = {2002},
 isbn = {1-58113-534-3},
 pages = {291--296},
 location = {Pisa, Italy},
 publisher = {Eurographics Association},
 }

@article{566612,
 author = {Peter-Pike Sloan and Jan Kautz and John Snyder},
 title = {Precomputed radiance transfer for real-time rendering in dynamic, low-frequency lighting environments},
 journal = {ACM Trans. Graph.},
 volume = {21},
 number = {3},
 year = {2002},
 issn = {0730-0301},
 pages = {527--536},
 doi = {http://doi.acm.org/10.1145/566654.566612},
 publisher = {ACM Press},
 }

@inproceedings{566611,
 author = {Ravi Ramamoorthi and Pat Hanrahan},
 title = {Frequency space environment map rendering},
 booktitle = {Proceedings of SIGGRAPH},
 year = {2002},
 isbn = {1-58113-521-1},
 pages = {517--526},
 location = {San Antonio, Texas},
 doi = {http://doi.acm.org/10.1145/566570.566611},
 publisher = {ACM Press},
 }

 @article{bb5202,
  author = "J.J. Koenderink and A.J. van Doorn and M. Stavridi",
  title = "Bidirectional Reflection Distribution Function Expressed In Terms Of  Surface Scattering Modes",
  journal = "ECCV",
  volume = "B",
  pages = "28-39",
  year = "1996",
}

@article{882281,
 author = {Peter-Pike Sloan and Jesse Hall and John Hart and John Snyder},
 title = {Clustered principal components for precomputed radiance transfer},
 journal = {ACM Trans. Graph.},
 volume = {22},
 number = {3},
 year = {2003},
 issn = {0730-0301},
 pages = {382--391},
 doi = {http://doi.acm.org/10.1145/882262.882281},
 publisher = {ACM Press},
 }
@inproceedings{311554,
 author = {Wolfgang Heidrich and Hans-Peter Seidel},
 title = {Realistic, hardware-accelerated shading and lighting},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1999},
 isbn = {0-201-48560-5},
 pages = {171--178},
 doi = {http://doi.acm.org/10.1145/311535.311554},
 publisher = {ACM Press/Addison-Wesley Publishing Co.},
 }

@phdthesis{ramamoorthiPhD,
 author = "Ravi Ramamoorthi",
 title = "A Signal-Processing Framework for Forward and Inverse Rendering",
 school = "Stanford University",
 year = "2002",
}

@article{dana99reflectance,
 author = "Kristin J. Dana and Bram van Ginneken and Shree K. Nayar and Jan J. Koenderink",
 title = "Reflectance and texture of real-world surfaces",
 journal = "ACM Transactions on Graphics",
 volume = "18",
 number = "1",
 pages = "1--34",
 year = "1999",
 url = "citeseer.nj.nec.com/dana97reflectance.html" }

@article{ lafortune97nonlinear,
    author = "Eric P. F. Lafortune and Sing-Choong Foo and Kenneth E. Torrance and Donald P. Greenberg",
    title = "Non-Linear Approximation of Reflectance Functions",
    journal = "Computer Graphics",
    volume = "31",
    number = "{Annual Conference Series}",
    pages = "117--126",
    year = "1997",
    url = "citeseer.nj.nec.com/lafortune97nonlinear.html" }

@inproceedings{134075,
 author = {Stephen H. Westin and James R. Arvo and Kenneth E. Torrance},
 title = {Predicting reflectance functions from complex surfaces},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1992},
 isbn = {0-89791-479-1},
 pages = {255--264},
 doi = {http://doi.acm.org/10.1145/133994.134075},
 publisher = {ACM Press},
 }
@article{360839,
 author = {Bui Tuong Phong},
 title = {Illumination for computer generated pictures},
 journal = {Commun. ACM},
 volume = {18},
 number = {6},
 year = {1975},
 issn = {0001-0782},
 pages = {311--317},
 doi = {http://doi.acm.org/10.1145/360825.360839},
 publisher = {ACM Press},
 }

@inproceedings{122739,
 author = {Fran\&\#231;is X. Sillion and James R. Arvo and Stephen H. Westin and Donald P. Greenberg},
 title = {A global illumination solution for general reflectance distributions},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1991},
 isbn = {0-89791-436-8},
 pages = {187--196},
 doi = {http://doi.acm.org/10.1145/122718.122739},
 publisher = {ACM Press},
 }
@inproceedings{37434,
 author = {Brian Cabral and Nelson Max and Rebecca Springmeyer},
 title = {Bidirectional reflection functions from surface bump maps},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1987},
 isbn = {0-89791-227-6},
 pages = {273--281},
 doi = {http://doi.acm.org/10.1145/37401.37434},
 publisher = {ACM Press},
 }

@InBook{szego,
 author = {Gabor Szeg\"{o}},
 title = "Orthogonal polynomials",
 publisher = "American Mathematical Society, Providence, Rhode Island",
 year = "1975",
 pages="page 29",
 edition = "4"
 }
@inproceedings{218439,
 author = {Peter Schr\"{o}der and Wim Sweldens},
 title = {Spherical wavelets: efficiently representing functions on the sphere},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1995},
 isbn = {0-89791-701-4},
 pages = {161--172},
 doi = {http://doi.acm.org/10.1145/218380.218439},
 publisher = {ACM Press},
 }

@article{882280,
 author = {Ren Ng and Ravi Ramamoorthi and Pat Hanrahan},
 title = {All-frequency shadows using non-linear wavelet lighting approximation},
 journal = {ACM Trans. Graph.},
 volume = {22},
 number = {3},
 year = {2003},
 issn = {0730-0301},
 pages = {376--381},
 doi = {http://doi.acm.org/10.1145/882262.882280},
 publisher = {ACM Press},
 }
@phdthesis{lalondePhD,
 author = "Paul Lalonde",
 title = "Representations and uses of light distribution functions",
 school = "University of British Columbia",
 year = "1997",
}
@inproceedings{zernikes,
 author = {James C. Wyant and Katherine Creath},
 title = {Basic wavefront aberration theory for optical metrology},
 booktitle = {Applied optics and Optical Engineering, Vol XI},
 year = {1992},
 isbn = {0-12-408611-X},
 pages = {27--39},
 publisher = {Academic Press, Inc.},
}

@article{ivanicSH,
 author = "Joseph Ivanic and Klaus Ruedenberg",
 title = "Rotation matrices for real spherical harmonics. Direct determination by recursion",
 journal = "J. Phys. Chem.",
 volume = "100",
 number = "15",
 year = "1996",
 pages = "6342--6347",
 }
@article{ivanicSH2,
 author = "Joseph Ivanic and Klaus Ruedenberg",
 title = "Additions and corrections : Rotation matrices for real spherical harmonics",
 journal = "J. Phys. Chem. A",
 volume = "102",
 number = "45",
 year = "1998",
 pages = "9099--9100",
 }
@article{choiSH,
 author = "Cheol Ho Choi and Joseph Ivanic and Mark S. Gordon and Klaus Ruedenberg",
 title = "Rapid and stable determination of rotation matrices between spherical harmonics by direct recursion",
 journal = "J. Chem. Phys.",
 volume = "111",
 number = "19",
 year = " 1999",
 pages = "8825--8831",
 }
 @article{blancoSH,
  author = "Miguel A. Blanco and M. Florez and M. Bermejo",
  title = "Evaluation of the rotation matrices in the basis of real spherical harmonics",
  journal = "J. Molecular Structure (Theochem)",
  volume = "419",
  year = "1997",
  pages = "19--27",
  }
@inproceedings{BRDFWard,
 author = {Gregory J. Ward},
 title = {Measuring and modeling anisotropic reflection},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1992},
 isbn = {0-89791-479-1},
 pages = {265--272},
 doi = {http://doi.acm.org/10.1145/133994.134078},
 publisher = {ACM Press},
 }
@article{BRDFCookTorrance,
 author = {R. L. Cook and K. E. Torrance},
 title = {A Reflectance Model for Computer Graphics},
 journal = {ACM Trans. Graph.},
 volume = {1},
 number = {1},
 year = {1982},
 issn = {0730-0301},
 pages = {7--24},
 doi = {http://doi.acm.org/10.1145/357290.357293},
 publisher = {ACM Press},
 }
@article{BRDFTorranceSparrow,
 author = {K. E. Torrance and E. M. Sparrow},
 title = {Theory for OffSpecular Reflection from Roughened Surfaces},
 journal = {Journal of the Optical Society of America},
 volume = {57},
 number = {9},
 year = {1967},
 pages = {1105--1114},
 }
@inproceedings{BRDFSillion,
 author = {Xiao D. He and Kenneth E. Torrance and Fran\&\#231;ois X. Sillion and Donald P. Greenberg},
 title = {A comprehensive physical model for light reflection},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1991},
 isbn = {0-89791-436-8},
 pages = {175--186},
 doi = {http://doi.acm.org/10.1145/122718.122738},
 publisher = {ACM Press},
 }
@inproceedings{Ward94Radiance,
 author = {Gregory J. Ward},
 title = {The RADIANCE lighting simulation and rendering system},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1994},
 isbn = {0-89791-667-0},
 pages = {459--472},
 doi = {http://doi.acm.org/10.1145/192161.192286},
 publisher = {ACM Press},
 }
@article{ gortler93wavelet,
    author = "Steven J. Gortler and Peter Schr{\"o}der and Michael F. Cohen and Pat Hanrahan",
    title = "Wavelet Radiosity",
    journal = "Computer Graphics",
    volume = "27",
    number = "{Annual Conference Series}",
    pages = "221--230",
    year = "1993",
    url = "citeseer.nj.nec.com/gortler93wavelet.html" }
@inproceedings{ dutre-global,
  author = "Philip Dutre",
  title = "Global Illumination Compendium",
  year = "2003",
  publisher = "http://www.cs.kuleuven.ac.be/~phil/GI/"
 }
@inproceedings{134078,
 author = {Gregory J. Ward},
 title = {Measuring and modeling anisotropic reflection},
 booktitle = {Proceedings of SIGGRAPH},
 year = {1992},
 isbn = {0-89791-479-1},
 pages = {265--272},
 doi = {http://doi.acm.org/10.1145/133994.134078},
 publisher = {ACM Press},
 }
@article{ makhotkin96HSH,
    author = "Oleg A. Makhotkin",
    title = "Analysis of Radiative Transfer Between Surfaces by Hemispherical Harmonics",
    journal = "Journal of Quantitative Spectroscopy and Radiative Transfer",
    volume = "56",
    number = "6",
    pages = "869--879",
    year = "1996",
    }
@article{ smelov98HSH,
    author = "Vladislav Vladimirovich Smelov",
    title = "On Completeness of Semispherical Harmonics System",
    journal = "Siberian Journal of Mathematics",
    volume = "1",
    number = "4",
    pages = "391--395",
    year = "1998",
    }