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Continue to ChatVolkov Type and Weighted Approximation Theorems for Bivariate q-Baskakov-Durrmeyer Type Operators - https://avesis.gazi.edu.tr/yayin/3a7853fc-4a07-413a-a990-8b4883f305da/volkov-type-and-weighted-approximation-theorems-for-bivariate-q-baskakov-durrmeyer-type-operators