Kalybay, Aigerim, and Saltanat Shalginbayeva. 2024. “Estimate of the Best Constant of Discrete Hardy-Type Inequality With Matrix Operator Satisfying the Oinarov Condition”. Eurasian Mathematical Journal 15 (2):42-47. https://doi.org/10.32523/2077-9879-2024-15-2-42-47.