Cox, P. T. and Pietrzykowski, T. "Solving Graph Problems Using LOGRAPH"

Jernigan, R; Hamill, B.W. (1984) Jernigan, R; Hamill, B.W. and Weintraub, D.M. (eds) The Role of Language in Problem Solving - 1 Edited Proceedings of the Symposium, Laurel, MD, USA, 29-31 October 1984  

Languages mentioned LOGRAPH {1983}