Digital decomposition and representation of video signals using projection theory. - Gerald M. Flachs; Wiley E. Thompson; U Yee Hsun; Steve Szymanski (ICASSP, 1978)

A Real-Time Video Tracking System. - Alton L. Gilbert; Michael K. Giles; Gerald M. Flachs; Robert B. Rogers; U Yee Hsun (IEEE Trans. Pattern Anal. Mach. Intell., 1980)