Baryshovets, P. P. “On Finite $A$-Groups With Complementable Nonmetacyclic Subgroups”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 54, no. 7, July 2002, pp. 1004-7, https://umj.imath.kiev.ua/index.php/umj/article/view/4138.