Efficient parallel global illumination using density estimation. - David Zareski; Bretton Wade; Philip M. Hubbard; Peter Shirley (PRS, 1995)

Global Illumination via Density Estimation. - Peter Shirley; Bretton Wade; Philip M. Hubbard; David Zareski; Bruce Walter; Donald P. Greenberg (Rendering Techniques, 1995)

Rendering falling rain and snow. - Niniane Wang; Bretton Wade (SIGGRAPH Sketches, 2004)