Users' preferences among different techniques for displaying the evaluation of LISP functions in an interactive debugger. - Joseph M. Hary; Lori A. Cohan; Michael J. Darnell (CHI, 1988)

The usability of lists versus graphs for representing the relationships between frames. - Joseph M. Hary; Tim P. McCollum; Michael J. Darnell; Gene A. Moore (SMC, 1989)