GW-Ada/Ed: free Ada 83 development environments for IBM PC-compatible and Apple Macintosh computers. - Michael B. Feldman; Charles W. Kann; Arthur Vargas Lopes; Manuel A. Pérez-Quiñones (TRI-Ada, 1995)

Integrating algorithm animation into a learning environment. - Charles W. Kann; Robert W. Lindeman; Rachelle S. Heller (Comput. Educ., 1997)