Determining intended evidence relations in natural language arguments. - Mark A. Young; Robin Cohen (Comput. Intell., 1991)

Nonmonotonic Sorts for Feature Structures. - Mark A. Young (AAAI, 1992)

A Logical Semantics for Nonmonotonic Sorts. - Mark A. Young; William C. Rounds (ACL, 1993)

Features, unification and nonmonotonicity. - Mark A. Young (1994)