Approximation of the derivatives of some combinations of operators of class B
English version (Springer): Ukrainian Mathematical Journal 39 (1987), no. 5, pp 473-477.
Citation Example: Naiko D. A. Approximation of the derivatives of some combinations of operators of class B // Ukr. Mat. Zh. - 1987. - 39, № 5. - pp. 583–587.
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