IvashchukYa. G. “$k$-Snakes in Finite-Order Interpolational Classes of Functions”. Ukrains’kyi Matematychnyi Zhurnal 45, no. 2 (February 25, 1993): 243-250. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5805.