Song, Xin, Chengqing Yuan, Yan Zhang, Qing Li, and Zhixiong Li. “A New Numerical Modelling Method for System Energy Efficiency Calculation”. Elektronika ir Elektrotechnika 24, no. 6 (December 17, 2018): 55-59. Accessed December 4, 2024. https://eejournal.ktu.lt/index.php/elt/article/view/21520.