The Birth of PEIRCE: A Conceptual Graphs Workbench. - Gerard Ellis; Robert Levinson (Workshop on Conceptual Graphs, 1992)

Multilevel hierarchical retrieval. - Robert Levinson; Gerard Ellis (Knowl. Based Syst., 1992)

A Conceptual Graphs Approach to Conceptual Schema Integration. - Peter N. Creasy; Gerard Ellis (ICCS, 1993)

Efficient Retrieval from Hierarchies of Objects using Lattice Operations. - Gerard Ellis (ICCS, 1993)

Exploiting the Induced Order on Type-Labeled Graphs for Fast Knowledge Retrieval. - Gerard Ellis; Fritz Lehmann (ICCS, 1994)

Managing complex objects in Peirce. - Gerard Ellis; Robert Levinson; Peter J. Robinson 001 (Int. J. Hum. Comput. Stud., 1994)

Book reviews. - Robert E. Filman; Donald Nute; Merrie Bergmann; Thomas Tymoczko; Barry Smith 001; Gerard Ellis; Ronald N. Giere (Minds Mach., 1994)

Object-Oriented Conceptual Graphs. - Gerard Ellis (ICCS, 1995)

Compiling Conceptual Graphs. - Gerard Ellis (IEEE Trans. Knowl. Data Eng., 1995)

Organization of Knowledge Using Order Factors. - Gerard Ellis; Stephen Callaghan (ICCS, 1997)

Filters for Graph Matching. - Steve Callaghan; Gerard Ellis; James Harland (CATS, 1998)