Simon Stegmaier Magnus Strengert Thomas Klein Thomas Ertl A Simple and Flexible Volume Rendering Framework for Graphics-Hardware-based Raycasting. 187-195 2005 conf/vg/2005 Volume Graphics http://www.eg.org/EG/DL/WS/VG/VG05/187-195.pdf db/conf/vg/vg2005.html#StegmaierSKE05