The irregular Z-buffer: Hardware acceleration for irregular data structures. - Gregory S. Johnson; Juhyun Lee; Christopher A. Burns; William R. Mark (ACM Trans. Graph., 2005)

Soft irregular shadow mapping: fast, high-quality, and robust soft shadows. - Gregory S. Johnson; Warren A. Hunt; Allen Hux; William R. Mark; Christopher A. Burns; Stephen Junkins (SI3D, 2009)

A lazy object-space shading architecture with decoupled sampling. - Christopher A. Burns; Kayvon Fatahalian; William R. Mark (High Performance Graphics, 2010)