Baras, John S., Dorsey, Arthur J., Makowski, Armand M., "Two Competing Queues with Linear Costs and Geometric Service Requirements", 22nd IEEE Conference on Decision and Control, pp. 1173-1178, San Antonio, Texas, December 1983
Baras, John S., Dorsey, Arthur J., Makowski, Armand M., "Two Competing Queues with Linear Costs: The μc-rule is Often Optimal", 22nd IEEE Conference on Decision and Control, pp. 186-209, San Antonio, Texas, December 1983