Kashpur, O. F., V. L. Makarov, and V. V. Khlobystov. “On Continual Interpolation Nodes for Operators in Linear Topological Spaces”. Ukrains’kyi Matematychnyi Zhurnal 62, no. 4 (April 25, 2010): 494–503. Accessed March 7, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/2883.