1. Bauer, A., and Calder, P.N. "Planning Open Pit Mining Operations Using Simulation," 1973 APCOM, Johannesburg, South Africa, pub. by South African Inst. of Mining and Met., Johannesburg, pp. 273 - 278.
2. Cross, Baron K. , and Williamson , Gary B., Digital Simulation of an Open-Pit Truck Haulage System, 1969 APCOM, Salt Lake City, pp 385 - 400, pub. by SME of AIME.