Programming Strategies In the Game of Push-Over. - Tho Le-Ngoc; Louis C. Vroomen (IEEE Micro, 1982)

Cheops: A Compact Explorer for Complex Hierarchies. - Luc Beaudoin; Marc-Antoine Parent; Louis C. Vroomen (IEEE Visualization, 1996)

Graphical user interfaces for hierarchies: workshop summary. - Louis C. Vroomen (ACM SIGCHI Bull., 1998)