U. Montanari, and F. Rossi. Graph-Grammars and Their Application to Computer Science, volume 291 of Lecture Notes in Computer Science, page 440-457. Springer, (1986)
A. Corradini, U. Montanari, F. Rossi, H. Ehrig, and M. Löwe. Graph-Grammars and Their Application to Computer Science, volume 532 of Lecture Notes in Computer Science, page 221-237. Springer, (1990)