Yi, T., Wang, C., Xie, N. and Gao, Y. 2013. A New Method to Solve Reactive Power Optimization Problems of Power System by Introducing the Branch Current. Elektronika ir Elektrotechnika. 19, 9 (Oct. 2013), 25-30. DOI:https://doi.org/10.5755/j01.eee.19.9.2523.