Khomenko, N.P. and Gavrіlуuk O.N. (1966) “Selection of the subgraphs of some types from the given graph ”, Ukrains’kyi Matematychnyi Zhurnal, 18(5), pp. 117–122. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/8449 (Accessed: 6 December 2025).