Shi, Fang, and Jie Wang. “The HVDC Supplementary Control for AC/DC Interconnected Power Grid Based on Hamilton Energy Function Theory”. Elektronika ir Elektrotechnika 20, no. 4 (March 26, 2014): 15-21. Accessed March 29, 2024. https://eejournal.ktu.lt/index.php/elt/article/view/4230.