Denis M. Manelski, Henry C. Lefkovits, H. J. Hebert. A facility for user definition of simple problem oriented languages. In Melvin Klerer, Juris Reinfelds, editors, Proceedings of the ACM Symposium on Interactive Systems for Experimental Applied Mathematics, Washington, D.C., USA, August 1, 1967. pages 192-195, ACM, 1967. [doi]
Abstract is missing.