Литвиненко, О.Є., Г.С. Краліна, and О.П Стьопушкіна. “The Mathematical Model of the Task of Compiling the Time-Table”. Proceedings of National Aviation University (archive) 19, no. 1 (January 1, 2004): 180–186. Accessed May 3, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/992.