Karki, S. ., M. . Kulkarni, M. D. . Mann, and H. . Salehfar. “Efficiency Improvements through Combined Heat and Power for On-Site Distributed Generation Technologies”. Distributed Generation &Amp; Alternative Energy Journal, vol. 22, no. 3, June 2007, pp. 19-34, doi:10.13052/dgaej2156-3306.2232.