Yoshiyuki Kaeriyama Daichi Zaitsu Kazuhiko Komatsu Ken-ichi Suzuki Tadao Nakamura Nobuyuki Ohba Ray Tracing Hardware System Using Plane-Sphere Intersections. 1-6 2006 conf/fpl/2006 FPL http://doi.ieeecomputersociety.org/10.1109/FPL.2006.311231 db/conf/fpl/fpl2006.html#KaeriyamaZKSNO06