[1] W. R. Heinzelman, A. Chandrakasan, and H. Balakrishnan, “Energy-efficient communication protocol for wireless microsensor networks,” in Proceedings of the 33rd annual Hawaii international conference on system sciences, pp. 10-pp, 2000.
[2] F. Xiangning and S. Yulin, “Improvement on LEACH protocol of wireless sensor network,” in 2007 International Conference on Sensor Technologies and Applications (SENSORCOMM 2007), pp. 260–264, 2007.
[3] S. H. Abbas and I. M. Khanjar, “Fuzzy Logic Approach for Cluster-Head Election in Wireless Sensor Network,” Int. J. Eng. Res. Adv. Technol., Vol. 5, No. 7, pp. 14–25, 2019.
[4] P. C. S. Rao, P. K. Jana, and H. Banka, “A particle swarm optimization based energy efficient cluster head selection algorithm for wireless sensor networks,” Wirel. Networks, Vol. 23, No. 7, pp. 2005–2020, 2017.
[5] W. B. Heinzelman, A. P. Chandrakasan, and H. Balakrishnan, “An application-specific protocol architecture for wireless microsensor networks,” IEEE Trans. Wirel. Commun., Vol. 1, No. 4, pp. 660–670, 2002.
[6] J. Tillett, R. Rao, and F. Sahin, “Cluster-head identification in ad hoc sensor networks using particle swarm optimization,” in 2002 IEEE International Conference on Personal Wireless Communications, pp. 201–205, 2002.
[7] S. M. Guru, S. K. Halgamuge, and S. Fernando, “Particle Swarm Optimisers for Cluster formation in Wireless Sensor Networks,” pp. 319–324, 2008.
[8] N. M. A. Latiff, C. C. Tsimenidis, and B. S. Sharif, “Energy-aware clustering for wireless sensor networks using particle swarm optimization,” IEEE Int. Symp. Pers. Indoor Mob. Radio Commun. PIMRC, No. October, 2007.
[9] P. k. Batra and K. Kant. "An improved cluster head selection algorithm using MAC layer information in wireless sensor network." Int. J. of Sensor Networks, Vol. 22, No. 2, pp. 75-86, 2016.
[10] D. Chandirasekaran and T. Jayabarathi, “Cat swarm algorithm in wireless sensor networks for optimized cluster head selection: a real time approach,” Cluster Comput., Vol. 22, pp. 1–11, 2017.
[11] M. I. Iqbal, S. Mehdi, A. Kanwal, M. M. Khan, M. A. Lodhi, and M. Fatima, “Optimal Selection of Cluster Head (CH) using Fuzzy Logicin Wireless Sensor networks (WSNs),” Int. J. of Computer Science and Information Security, Vol. 14, pp. 25–30, 2017.
[12] S. Kumar and S. Mehfuz, “A PSO-based Malicious Node Detection and Energy Efficient Clustering in Wireless Sensor Network,” 2019 6th Int. Conf. Signal Process. Integr. Networks, pp. 859–863, 2019.
[13] M. S. Azizi and M. L. Hasnaoui, “An energy efficient clustering protocol for homogeneous and heterogeneous wireless sensor network,” ACM Int. Conf. Proceeding Ser., pp. 1-6, 2019.
[14] S. K. Haider, M. A. Jamshed, A. Jiang, and H. Pervaiz, “An energy efficient cluster-heads re-usability mechanism for wireless sensor networks,” 2019 IEEE Int. Conf. Commun. Work., pp. 1–6, 2019.
[15] S. K. Haider, M. A. Jamshed, A. Jiang, H. Pervaiz, and Q. Ni, “UAV-assisted Cluster-head Selection Mechanism for Wireless Sensor Network Applications,” 2019 UK/China Emerg. Technol. (UCET 2019), No. August, pp. 1–2, 2019.
[16] A. Shokrollahi and B. Mazloom-Nezhad Maybodi, “An energy-efficient clustering algorithm using fuzzy c-means and genetic fuzzy system for wireless sensor network,” J. Circuits, Syst. Comput., Vol. 26, No. 1, 2017.
[17] A. Qayyum, H. ur Rahman, M. Zahid Khan, and M. Faisal, “A NEW ENERGY-Efficient Cluster-Head Selection (NEETCH) Technique to Increase Wireless Sensor Network’s Lifetime”, Journal of Information Communication Technologies and Robotic Applications, pp. 52–61, 2018.
[18] T. M. Behera, S. K. Mohapatra, U. C. Samal, M. S. Khan, M. Daneshmand, and A. H. Gandomi, “Residual energy-based cluster-head selection in WSNs for IoT application,” IEEE Internet of Things J., Vol. 6, No. 3, pp. 5132–5139, 2019.
[19] S. M. Hosseinirad and S. K. Basu. "Wireless sensor network design through genetic algorithm.", Journal of AI and Data Mining, Vol. 2, No. 1, pp-85-96, 2014.
[20] B. Singh and D. K. Lobiyal, “A novel energy-aware cluster head selection based on particle swarm optimization for wireless sensor networks,” Human-centric Comput. Inf. Sci., Vol. 2, No. 1, pp. 1–18, 2012.
[21] P. T. Karthick and C. Palanisamy, “Optimized cluster head selection using krill herd algorithm for wireless sensor network,” Automatika: časopis za automatiku, mjerenje, elektroniku, računarstvo i komunikacije, Vol. 60, No. 3, pp. 340–348, 2019.
[22] H. Al-Kashoash, Z. Rahman, and E. Alhamdawee, “Energy and RSSI based fuzzy inference system for cluster head selection in wireless sensor networks,” ACM Int. Conf. Proceeding Ser., No. May, pp. 102–105, 2019.
[23] Y. K. Yousif, R. Badlishah, N. Yaakob, and A. Amir, “An Energy Efficient and Load Balancing Clustering Scheme for Wireless Sensor Network (WSN) Based on Distributed Approach,” J. Phys. Conf. Ser., Vol. 1019, No. 1, 2018.
[24] J.G. Lee, S. Chim, H. H. Park, “Energy-Efficient Cluster-Head Selection for Wireless Sensor Networks using Sampling-based Spider Monkey Optimization,” Sensors, Vol. 19, No. 23, 2019.
[25] M. Lewandowski and B. Płaczek, “An event-aware cluster-head rotation algorithm for extending lifetime of wireless sensor network with smart nodes,” Sensors (Switzerland), Vol. 19, No. 19, 2019.
[26] K. Haseeb, N. Abbas, M. Q. Saleem, O. E. Sheta, K. Awan, N. Islam, W. ur Rehman, T. Salam, “RCER : Reliable Cluster-based Energy-aware Routing protocol for heterogeneous Wireless Sensor Networks”, PloS one, Vol. 14, No. 9, pp. 1–24, 2019.
[27] B. Rout, I. B. Prasad, and V. Pal, “Fuzzy Logic Based Clustering for Energy Efficiency in Wireless Sensor Networks,” In Conference Proceedings of ICDLAIR2019, pp. 1–13, 2019.
[28] Y. Liu, Q. Wu, T. Zhao, Y. Tie, F. Bai, and M. Jin, “An improved energy-efficient routing protocol for wireless sensor networks,” Sensors (Switzerland), Vol. 19, No. 20, pp. 1–20, 2019.
[29] D. Lin and Q. Wang, “An Energy-Efficient Clustering Algorithm Combined Game Theory and Dual-Cluster-Head Mechanism for WSNs,” IEEE Access, Vol. 7, pp. 49894–49905, 2019.
[30] J. Wang, Y. Cao, B. Li, H. jin Kim, and S. Lee, “Particle swarm optimization based clustering algorithm with mobile sink for WSNs,” Futur. Gener. Comput. Syst., Vol. 76, pp. 452–457, 2017.
[31] M. Zeng, X. Huang, B. Zheng, and X. Fan, “A heterogeneous energy wireless sensor network clustering protocol,” Wirel. Commun. Mob. Comput., Vol. 2019, 2019.
[32] A. Saini, A. Kansal, and N. S. Randhawa, “Minimization of energy consumption in WSN using hybrid WECRA approach,” Procedia Comput. Sci., Vol. 155, pp. 803–808, 2019.
[33] T. S. Murugan and A. Sarkar. "Optimal cluster head selection by hybridisation of firefly and grey wolf optimisation." , Vol. 14, No. 3, pp. 296-305, 2018.
[34] A. Shankar and N. Jaisankar, “Energy efficient cluster head selection for wireless sensor network by improved firefly optimisation.” International Journal of Advanced Intelligence Paradigms, Vol.19, No. 2, pp.128-45, 2021.
[35] J. Kennedy and R. Eberhart, “Particle swarm optimization.” In Proceedings of ICNN'95-international conference on neural networks, Vol. 4, pp. 1942-1948, 1995.