Bekmaganbetov, K.A., K.Ye. Kervenev, and E.D. Nursultanov. “Nikol’skii-Besov Spaces With a Dominant Mixed Derivative and With a Mixed Metric: Interpolation Properties, Embedding Theorems, Trace and Extension Theorems”. Eurasian Mathematical Journal 16, no. 2 (June 30, 2025): 30–41. Accessed August 25, 2025. https://emj.enu.kz/index.php/main/article/view/757.