H. Zhang and H. Shen, “Balancing Energy Consumption to Maximize Network Lifetime in Data-Gathering Sensor Networks,” IEEE Transactions on Parallel and Distributed Systems, Vol. 20, No. 10, 2009, pp. 1526-1539.
 Y. Xu, J. Heidemann and D. Estrin, “Geography- Informed Energy Conservation for Ad Hoc Routing,” Proceedings of the 7th Annual International Conference on Mobile Computing and Networking, Rome, July 2001, pp. 70-84.
 D. J. Baker and A. Ephremides, “The Architectural Organization of a Mobile Radio Network via a Distributed Algorithm,” IEEE Transactions on Commu- nications, Vol. 29, No. 11, 1981, pp. 1694 -1701.
 M. Ettus, “System Capacity, Latency, and Power Consumption in Multihoprouted SS-CDMA Wireless Networks,” Proceedings of IEEE Radio and Wireless Conference, Colorado Springs, 9-12 August 1998, pp. 55-58.
 T. H. Meng and V. Rodoplu, “Distributed Network Protocols for Wireless Communication,” Proceedings of the 1998 IEEE International Symposium on Circuits and Systems, Monterey, Vol. 4, June 1998, pp. IV-600-IV- 603.
 S. Singh, M. Woo and C. S. Raghavendra, “Power- Aware Routing in Mobile Ad Hoc Networks,” Proceed- ings of Fourth Annual ACM/IEEE International Con- ference on Mobile Computing and Networking, Dallas, October 1998, pp. 181-190.
 W. Guo, Z. Liu and G. Wu, “An Energy-Balanced Transmission Scheme for Sensor Networks,” Proceed- ings of the First International Conference Embedded Networked Sensor Systems, Los Angeles, 5-7 November 2003, pp. 300-301.
 H. Zhang, H. Shen and Y. Tan, “Optimal Energy Balanced Data Gathering in Wireless Sensor Networks,” Proceedings of the 21st International Parallel and Distributed Processing Symposium, Long Beach, 26-30 March 2007, pp. 1-10.
 A. Zhao, J. Yu and Z. Li, “A Data Aggregation Scheme in Wireless Sensor Networks for Structure Monitoring,” Proceedings of the 2009 International Conference on Information Management, Innovation Management and Industrial Engineering, Xi’an, 26-27 December 2009, Vol. 4, pp. 623-626.
 J. N. Al-Karaki, R. Ul-Mustafa and A. E. Kamal, “Data Aggregation and Routing in Wireless Sensor Networks: Optimal and Heuristic Algorithms,” Computer Networks, Vol. 53, No. 7, 2009, pp. 945-960.
 W. R. Heinzelman, A. Chandrakasan and H. Balakrishnan, “Energy-Efficient Communication Protocol for Wireless Microsensor Networks,” Proceedings 33rd Hawaii Inter- national Conference System Sciences, Vol. 8, 2000, p. 8020.
 A. S. Malik, J. Kuang, J. Liu and W. Chong, “Energy Consumption and Lifetime Analysis in Cluster-Based Wireless Sensor Networks for Periodic Monitoring Applications,” Proceedings of the 2009 International Conference on Networks Security, Wireless Communica- tions and Trusted Computing, Wuhan, Vol. 1, 25-26 April 2009, pp. 657-661.
 Z. Zhang, “Towards Cluster Based Wireless Sensor Network Deployment Management and Network Coverage Verification,” Proceedings of the 11th Asia- Pacific Symposium on Network Operations and Manage- ment: Challenges For Next Generation Network Opera- tions and Service Management, Beijing, Vol. 5297, 22-24 October 2008, pp. 197-206.
 Y. Huang, N. Wang and M. Chen, “Performance of a Hierarchical Cluster-Based Wireless Sensor Network,” Proceedings of the 2008 IEEE international Conference on Sensor Networks, Ubiquitous, and Trustworthy Computing, Taichung, 11-13 June 2008, pp. 349-354.
 H. Su and X. Zhang, “Optimal Transmission Range for Cluster-Based Wireless Sensor Networks with Mixed Communication Modes,” Proceedings of the 2006 inter- national Symposium on World of Wireless, Mobile and Multimedia Networks, Buffalo, 26-29 June 2006, pp. 244-250.
 Y. Huang, N. Wang, C. Chen, J. Chen and Z. Guo, “Equalization of Energy Consumption at Cluster Head for Prolonging Lifetime in Cluster-Based Wireless Sensor Networks,” WSEAS Transactions on Communications, Vol. 8, No. 5, May 2009, pp. 427-436.
 Y. Chang, J. Huang and T. Juang, “Dependable Data Aggregation on Cluster-Based Wireless Sensor Net- works,” Proceedings of the 11th Conference on 11th WSEAS international Conference on Communications, Crete Island, Vol. 11, 26-28 July 2007, pp.300-305.