H. L. Calhoun

Operational Capability Study. Volume I. 'SOURCE' Program User's Manual (Simulation of Utilization, Resources, Cost, and Efficiency).

D. D. Gregor, J. A. Bado, R. L. Davis, 1969 .

The Management and Analysis of International Event Data: A Computerized System for Monitoring and Projecting Event Flows.

Charles A. McClelland, Rodney G. Tomlinson, Ronald G. Sherwin, 1971 .