Волгин, С.Н., В.Л. Лашхи, and Н.Н. Гришин. “The Main Objective Himmotologii”. Proceedings of National Aviation University 38, no. 1 (January 1, 2009): 104–107. Accessed May 18, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/1672.