Mental Models of Recursion and Their Use in the SCENT Programming Advisor. - Shawkat Bhuiyan; Jim E. Greer; Gordon I. McCalla (KBCS, 1989)

Learning Recursion Through the Use of a Mental Model-Based Programming Environment. - Shawkat Bhuiyan; Jim E. Greer; Gordon I. McCalla (Intelligent Tutoring Systems, 1992)

Supporting the Learning of Recursive Problem Solving. - Shawkat Bhuiyan; Jim E. Greer; Gordon I. McCalla (Interact. Learn. Environ., 1994)