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Kaur K, Bhatia SS, Ram B. Double trigonometric series with coefficients of bounded variation of higher order. Tamkang J. Math. [Internet]. 2004 Sep. 30 [cited 2024 Apr. 20];35(3):267-80. Available from: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/208