Shekutkovski, N., and M. Shoptrajanov. “Morse Decomposition and Intrinsic Shape in Topological Spaces”. Methods of Functional Analysis and Topology 28, no. 2 (June 25, 2022): 157–168. Accessed December 15, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/829.