1. MARC User information manual, available from MARC Analysis Research Corporation, Palo Alto, CA.
2. SACON: A knowledge-based consultant for structural analysis;Bennett,1979
3. PHOENICS Versions 1.4, and 1.5.3. Parabolic Hyperbolic Or Elliptic Numerical Integration Code Series, CHAM Ltd, London.
4. Alvey IKBS Research Theme Workshop: Intelligent Front Ends;Bundy,1984