A prototype Spatial Data Management System. - Christopher F. Herot; Richard T. Carling; Mark Friedell; David Kramlich (SIGGRAPH, 1980)

Program visualization: Graphics support for software development. - David Kramlich; Gretchen P. Brown; Richard T. Carling; Christopher F. Herot (DAC, 1983)

Programming Visualization: Graphical Support for Software Development. - Gretchen Brown; Richard T. Carling; Christopher F. Herot; David Kramlich; Paul Souza (Computer, 1985)