BoykoO. P., MartynyukO. M., and PivovarchikV. M. “Upper Bound for the Diameter of a Tree in the Quantum Graph Theory”. Ukrains’kyi Matematychnyi Zhurnal 74, no. 8 (October 4, 2022): 1020 - 1028. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7176.