@TechReport{Krivanek:2005:FAS,
  author =   {Jaroslav K{\v{r}}iv{\'{a}}nek and Jaakko Konttinen and Sumanta Pattanaik and Kadi Bouatouch},
  title =    {Fast Approximation to Spherical Harmonic Rotation},
  institution = {IRISA},
  address = {Rennes, France},
  year =     {2005},
  number =   {1728},
  month =    {July},
  url =      {http://hal.inria.fr/docs/00/03/42/60/PDF/PI-1728.pdf},
}