@InProceedings{SCI:Pes2004a, author = "S. Pesco and P. Lindstrom and V. Pascucci and C.T. Silva", title = "Implicit Occluders", booktitle = c-VVIS2004, pages = "47--54", year = "2004", url = "http://www.sci.utah.edu/publications/pesco04/Pesco04_ImplicitOccluders.pdf", }