1. Elson, J., Romer, K.: Wireless Sensor Networks: A New Regime for Time Synchronization. In: Proceedings of the First Workshop on Hot Topics in Net-works (HotNets-I), October 28-29, Princeton, New Jersey (2002)
2. Yang, Z.-j., Zhao, D.-f., Ding, H.-w., Zhao, Y.-f.: Research on Two-class Priority Based Polling System. Electronica Sinica 37(7), 1452–1456 (2009) (in Chinese)
3. Zhao, D., Zheng, S.: Analysis of a Polling Model with Exhaustive Service. Acta. Electronica Sinica 22(5), 102–107 (1994) (in Chinese)
4. Zhao, D., Zheng, S.: Message Waiting Time Analysis for a Polling System with Gated Service. Journal of China Institute of Communications 15(2), 18–23 (1994) (in Chinese)
5. Zhao, D.: Performance Analysis of Polling Systems with Limited Service. Journal of Electronics 15(1), 43–49 (1998)