Surface generation in a tutorial dialogue based on analysis of human tutoring sessions. - Ru-Charn Chang; Martha W. Evens; Allen A. Rovick; Joel A. Michael (CBMS, 1992)

CIRCSIM-Tutor: An Intelligent Tutoring System Using Natural Language Dialogue. - Martha W. Evens; Ru-Charn Chang; Yoon Hee Lee; Leemseop Shim; Chong-Woo Woo; Yuemei Zhang (ANLP, 1997)