ChernikovN. S. “On Periodic Locally Solvable Groups Decomposable into the Product of Two Locally Nilpotent Subgroups”. Ukrains’kyi Matematychnyi Zhurnal 52, no. 7 (July 25, 2000): 965-970. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4495.