Mel’nik, V.L. (1999) “Investigation of smoothness conditions on the boundary for the strong linear convexity of a domain”, Ukrains’kyi Matematychnyi Zhurnal, 51(12), pp. 1710–1713. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4774 (Accessed: 7 April 2025).