Omer، A. (1975). A COMPARATIVE STUDY OF EFFICIENCY BETWEEN TWO ALTERNATIVE QUEUEING MODELS WITH TWO STREAMS OF ARRIVALS. مجلة مصر المعاصرة، مج66, ع361 ، 245 - 254. مسترجع من http://search.mandumah.com/Record/663661
Omer، Ahmed. "A COMPARATIVE STUDY OF EFFICIENCY BETWEEN TWO ALTERNATIVE QUEUEING MODELS WITH TWO STREAMS OF ARRIVALS." مجلة مصر المعاصرة مج66, ع361 (1975): 245 - 254. مسترجع من http://search.mandumah.com/Record/663661