This document summarizes a research paper that proposes an energy efficient clustering approach for wireless sensor networks. The approach uses a corona-based model where the monitoring area is divided into concentric circles. Nodes calculate their virtual concentric circle band index to determine eligibility as cluster heads. Eligible nodes use a backoff timer approach where the timer is proportional to the node's distance from the center of its band. The first node's timer to expire advertises itself as the cluster head. This balances energy usage. The paper also describes adding and removing nodes from clusters to provide scalability without affecting the existing infrastructure. Simulation results show the effectiveness of the proposed clustering method.