Echeverri, M. G., R. A. G. Rendón, and J. M. L. Lezama. “COMBINED OPTIMAL TAP SETTING AND REACTIVE POWER INJECTION FOR LOSS REDUCTION IN DISTRIBUTION SYSTEMS”. Revista EIA / English Version, vol. 11, no. 21, June 2014, pp. 13-21, https://revistapostgrado.eia.edu.co/index.php/Reveiaenglish/article/view/918.