Daniel G. Bobrow Gary G. Hendrix William A. Martin John McCarthy 0001 Allen Newell Roger C. Schank Brian Cantwell Smith N. S. Sridharan Knowledge Representation. 983-992 1977 conf/ijcai/1977 IJCAI db/conf/ijcai/ijcai77.html#BobrowHMMNSSS77 http://ijcai.org/Proceedings/77-2/Papers/088.pdf