R. K. Gupta V. Srinivasan P. L. Yu: Optimal State-Dependent Pricing Policies for a Class of Stochastic Multi - Unit Rental System. Graduate School of Business, Research Report No. 280, Stanford University 1975.
 S. A. Lippman: Applying a new device in the optimization of exponential queueing systems
. Oper. Res. 23 (1975), 687-710. MR 0443125
 F. T. Man: Optimal control of time varying queueing systems
. Management Sci. 19 (1973), 1249-1256. MR 0334343
 B. Tilt: Queueing Process with Optimization by One or More Decision Makers. Ph. D. Thesis, G. I. T. (1977).
 A. J. Rolf: The Control of a Multiple Facility Multiple Channel Queueing System with Parallel Input Streams. Technical Report No. 22, Graduate School of Business, Stanford University 1965.
 J. Young: Administrative control of multiple channel queueing systems with parallel input streams. Oper. Res. 14 (1966), 145-156.
 N. Hadidi: A queueing model with variable arrival rates
. J. Periodica Mathematica Hungarica 6 (1975), 39-47. MR 0375513