PanasyukS.P., and SultanovS.R. “On the Problem of the Dieudonne Completeness of the Spaces of Closed Subspaces and Subgroups ”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 11 (November 6, 1992): 1525-1529. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8255.