Speech-enabled application programs in Java for use in education. - Elizabeth Hatfield; Mary Davis; Deborah Kilpatrick (J. Comput. Sci. Coll., 2000)

Charles Peirce's existential graphs: a logic tool in Java. - Elizabeth Hatfield; Deborah Kilpatrick; Lut Wong (J. Comput. Sci. Coll., 2001)

A Java implementation for Peirce's existential graphs. - Dennis Higgins; Bram van Heuveln; Elizabeth Hatfield; Deborah Kilpatrick; Lut Wong (J. Comput. Sci. Coll., 2001)