1. Akyildiz, I. F., Su, W., Sankarasubramaniam, Y., & Cayirci, E. (2002). Wireless sensor networks: A survey. Computer Networks, 38, 393–422.
2. Abbasi, A. A., & Younis, M. (2007). A survey on clustering algorithms for wireless sensor networks. Computer Communications, 30(14), 2826–2841.
3. Rasyid M. U. H. Al, Nadhori I. U., Sudarsono A., & Luberski R. (2014). Analysis of slotted and unslotted CSMA/CA Wireless Sensor Network for E-healthcare system In Proceedings of the International Conference on Computer, Control, Informatics and Its Applications (IC3INA), Indonesia, 21-23 October.
4. Wei C., Yang J., Gao Y., & Zhang Z. (2011). Cluster-based routing protocols in wireless sensor networks: A survey, In Proceedings of the International Conference on Computer Science and Network Technology (ICCSNT), Harbin, China, 24-26 December.
5. Heinzelman W. R., Chandrakasan A. P., & Balakrishnan H. (2000). Energy efficient communication protocol for wireless micro sensor networks, In Proceedings of the 33rd Hawaii International Conference on System Sciences, Island of Maui, January 4-7.