ZhyhalloK. M. and ZhyhalloT. V. (2019) “On the approximation of functions from the Hölder class given on a segment by their biharmonic Poisson operators”, Ukrains’kyi Matematychnyi Zhurnal, 71(7), pp. 915-921. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1485 (Accessed: 21November2024).