Teixeira, João, Eduardo S. Albuquerque, Artur L. dos Santos, Veronica Teichrieb, and Judith Kelner.
" Improving Ray Tracing Anti-aliasing Performance through Image Gradient Analysis." <em>Proceedings of the 11th Symposium on High-Performance Computing Systems,
Petrópolis, 2010</em>. SBC, 2010,  
pp.144-151.