Segmentation Processes in the VISIONS System. - J. Prager; Paul A. Nagin; Ralf R. Kohler; Allen R. Hanson; Edward M. Riseman (IJCAI, 1977)

Segmenting images using localized histograms and region merging. - J. Ross Beveridge; Joey Griffith; Ralf R. Kohler; Allen R. Hanson; Edward M. Riseman (Int. J. Comput. Vis., 1989)