David G. Foxall, Marc L. Joliat, Rym F. Kamel, J. J. Miceli. Protel: a high level language for telephony. In The IEEE Computer Society's Third International Computer Software and Applications Conference, COMPSAC 1979, 6-8 November, 1979, Chicago, Illinois, USA. pages 193-197, IEEE, 1979. [doi]
Abstract is missing.