Kryakin, Y.V. and Takev, M.D. (1995) “Interpolation Whitney constants”, Ukrains’kyi Matematychnyi Zhurnal, 47(8), pp. 1038–1043. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5501 (Accessed: 10 April 2025).