Babeshko, V.A., Evdokimova, O.V. and Babeshko, O.M. (2013) “Topological approach in boundary problems for different dimensions”, Ecological Bulletin of Research Centers of the Black Sea Economic Cooperation, (2), pp. 5–9. Available at: https://vestnik.kubsu.ru/article/view/473 (Accessed: 15 December 2025).