MathSciNet bibliographic data MR750116 (85h:41065) 41A50 Ganzburg, M. I. Criteria for best approximation of locally integrable functions in $L({\bf R})$$L({\bf R})$. (Russian) Studies in current problems of summation and approximation of functions and their applications, 11–16, Dnepropetrovsk. Gos. Univ., Dnepropetrovsk, 1983. Links to the journal or article are not yet available

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