[1]
I. K. Redchuk, “Separating functions, spectral theory of graphs, and locally scalar representations in Hilbert spaces”, Ukr. Mat. Zhurn., vol. 58, no. 1, pp. 36–46, Jan. 2006, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3433