Green's formula and the hypothesis of solvability for nonlocal elliptic boundary problems
English version (Springer): Ukrainian Mathematical Journal 25 (1973), no. 4, pp 396-405.
Citation Example: Roitberg Ya. A., Sheftel' Z. G. Green's formula and the hypothesis of solvability for nonlocal elliptic boundary problems // Ukr. Mat. Zh. - 1973. - 25, № 4. - pp. 479—491.
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