Волгин, С.Н., В.Л. Лашхи, and Н.Н. Гришин. “The Main Objective Himmotologii”. Proceedings of National Aviation University (archive) 38, no. 1 (January 1, 2009): 104–107. Accessed April 13, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/1672.