Recognition and Depth Perception of Objects in Real World Scenes. - Robert J. Douglass (IJCAI, 1977)

A 'Recognition Cone' Perceptual System: Brief Test Results. - Leonard Uhr; Robert J. Douglass (IJCAI, 1977)

A parallel-serial recognition cone system for perception: some test results. - Leonard Uhr; Robert J. Douglass (Pattern Recognit., 1979)

Special Feature A Qualitative Assessment of Parallelism in Expert Systems. - Robert J. Douglass (IEEE Softw., 1985)