Trong Duong Quoc Heiko Perkuhn Daniel Catrein Uwe Naumann Toni Anwar Optimization and Evaluation of a Multimedia Streaming Service on Hybrid Telco cloud http://arxiv.org/abs/1109.1583 2011 CoRR abs/1109.1583 db/journals/corr/corr1109.html#abs-1109-1583