The Scope of Coreference in Conceptual Graphs. - John Esch (Workshop on Conceptual Graphs, 1992)

Contexts and Concepts, Abstraction Duals. - John Esch (ICCS, 1994)

Contexts, Canons and Coreferent Types. - John Esch (ICCS, 1994)

In Implementation Model for Contexts and Negation in Conceptual Graphs. - John Esch; Robert Levinson (ICCS, 1995)

Propagating Truth and Detecting Contradiction in Conceptual Graph Database. - John Esch; Robert Levinson (ICCS, 1996)