1. On a Congestion Problem in an Aircraft Factory
2. CARBILL , T. B. , 1969 , Optimal control of a queue with variable service rates . Technical Report No. 75, Department of Operations Research , Cornell University , Ithaca , New York .
3. A Classified Bibliography of Research on Optimal Design and Control of Queues
4. Single machine sequencing with random processing times and random due-dates
5. GROSS , D. , and HARRIS , C. M. , 1974 ,Fundamentals of Queueing Theory( New York Wiley ), pp. 364 – 377 .