Mokin, Oleksandr, Borys Mokin, і Yana Khomiuk. 2018. «SUBSTANTION OF THE EXTREMUM OCCURRENCE ON THE GRAPH OF THE MATHEMATICAL MODEL OF STATICS OF THE INSTRUMENT CURRENT TRANSFORMER». Scientific Works of Vinnytsia National Technical University, вип. 1 (Червень). https://works.vntu.edu.ua/index.php/works/article/view/524.