Embedding Rule Independent Theory of Graph Grammars. - Janice Jeffs (Graph-Grammars and Their Application to Computer Science, 1986)

Order Independent NCE Grammars Recognized in Polynomial Time. - Janice Jeffs (Inf. Process. Lett., 1991)

The chip firing game onn-cycles. - Janice Jeffs; Suzanne M. Seager (Graphs Comb., 1995)