On the optimal control of two queues with server setup times and its analysis - Hofri, Micha 1942-; Ross, Keith W. 1956- (<<haṭ->> Ṭeḵniyyôn, Māḵôn Ṭeḵnôlôgî le-Yiśrā'ēl <Ḥêfā>, 1986)