Kumar, Dilip: 'Performance analysis of energy efficient clustering protocols for maximising lifetime of wireless sensor networks', IET Wireless Sensor Systems, 2014, 4, (1), p. 9-16, DOI: 10.1049/iet-wss.2012.0150
IET Digital Library, https://digital-library.theiet.org/;jsessionid=2tf2rv4r21qql.x-iet-live-01content/journals/10.1049/iet-wss.2012.0150