Zlosnikas, V., A. Baškys, and V. Gobis. “Error Compensation Method for Pulse Forming Circuit of Power Factor Meter”. Elektronika ir Elektrotechnika 65, no. 1 (January 3, 2006): 56-59. Accessed September 25, 2022. https://eejournal.ktu.lt/index.php/elt/article/view/10565.