Sharma, R., and S. Prakash. “HHO-LPWSN: Harris Hawks Optimization Algorithm for Sensor Nodes Localization Problem in Wireless Sensor Networks”. EAI Endorsed Transactions on Scalable Information Systems, vol. 8, no. 31, Feb. 2021, p. e5, doi:10.4108/eai.25-2-2021.168807.