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Bhaya, E.S., 2010. Interpolating operators for multiapproximation. J. Math. Stat., 6: 240-245.
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Kopotun, K.A., D. Leviatan and I.A. Shevchuk, 2015. New moduli of smoothness: Weighted DT moduli revisited and applied. Constructive Approximation, 42: 129-159.
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