Integration of shape from X modules: combining stereo and shading. - James Edwin Cryer; Ping-Sing Tsai; Mubarak Shah (CVPR, 1993)

Analysis of shape from shading techniques. - Ruo Zhang; Ping-Sing Tsai; James Edwin Cryer; Mubarak Shah (CVPR, 1994)

Integration of shape from shading and stereo. - James Edwin Cryer; Ping-Sing Tsai; Mubarak Shah (Pattern Recognit., 1995)

Shape from Shading: A Survey. - Ruo Zhang; Ping-Sing Tsai; James Edwin Cryer; Mubarak Shah (IEEE Trans. Pattern Anal. Mach. Intell., 1999)