EmetsO. A. (1994) “Extremal properties of nondifferentiable convex functions on euclidean sets of combinations with repetitions”, Ukrains’kyi Matematychnyi Zhurnal, 46(6), pp. 680–691. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5695 (Accessed: 24November2024).