Русаловський, А.В., Т.М. Кот, and О.В. Кошуков. “Computer-Aided Training and Testing”. Proceedings of National Aviation University (archive) 33, no. 3-4 (March 1, 2007): 174–177. Accessed April 13, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/1520.