Vasyanin, Volodymyr O., Oleksandr M. Trofymchuk, and Liudmyla P. Ushakova. “Research of the Optimization Problem of Structure Hierarchical Communication Network With Changing Its Parameters”. Environmental safety and natural resources 49, no. 1 (March 29, 2024): 99–125. Accessed August 31, 2025. https://es-journal.in.ua/article/view/301754.