Dzyubenko, H. A., Gilewicz, J. and Shevchuk, I. A. (2002) “Coconvex Pointwise Approximation”, Ukrains’kyi Matematychnyi Zhurnal, 54(9), pp. 1200-1212. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4159 (Accessed: 13May2024).