1.
Usenko EG. Criteria for the coincidence of the kernel of a function with the kernels of its Riesz and Abel integral means. Ukr. Mat. Zhurn. [Internet]. 1998Dec.25 [cited 2024Nov.24];50(12):1712–1714. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4792