1.
Gubreev GM, Ignatenko TR. On the class of orthogonalizators of the families of exponents with real frequencies. Ukr. Mat. Zhurn. [Internet]. 1992Sep.8 [cited 2024Nov.24];44(8):1031-44. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8031