Knyagina, V. N., and V. N. Tyutyanov. “Factorizations of Finite Groups into $r$-Soluble Subgroups With Given Embeddings”. Ukrains’kyi Matematychnyi Zhurnal 66, no. 10 (October 25, 2014): 1431–1435. Accessed April 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2235.