Xiaolan, Y., and Y. Xue. “Finite Groups With X-Quasipermutable Sylow Subgroups”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 67, no. 12, Dec. 2015, pp. 1715-22, https://umj.imath.kiev.ua/index.php/umj/article/view/2104.