Spelling Correction for an Intelligent Tutoring System. - Yoon Hee Lee; Martha W. Evens (Great Lakes Computer Science Conference, 1989)

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)