Kovalevsky, Alexander A. On the convergence of solutions of variational problems with pointwise functional constraints in variable domains. (English. Russian original) Zbl 1465.49012 J. Math. Sci., New York 254, No. 3, 375-396 (2021); translation from Ukr. Mat. Visn. 17, No. 4, 509-537 (2020). MSC: 49J45 PDF BibTeX XML Cite \textit{A. A. Kovalevsky}, J. Math. Sci., New York 254, No. 3, 375--396 (2021; Zbl 1465.49012); translation from Ukr. Mat. Visn. 17, No. 4, 509--537 (2020) Full Text: DOI
Khachay, O. Yu. Asymptotic problem for second-order ordinary differential equation with nonlinearity corresponding to a butterfly catastrophe. (English. Russian original) Zbl 1461.34078 J. Math. Sci., New York 252, No. 2, 247-265 (2021); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 152, 125-142 (2018). Reviewer: Bertin Zinsou (Johannesburg) MSC: 34E05 34A34 34B40 34A12 34B08 PDF BibTeX XML Cite \textit{O. Yu. Khachay}, J. Math. Sci., New York 252, No. 2, 247--265 (2021; Zbl 1461.34078); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 152, 125--142 (2018) Full Text: DOI