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Additional information
Translated from Sibirskii Matematicheskii Zhurnal, Vol. 7, No. 4, pp. 920–938, July–August, 1966.
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Tovmasyan, N.E. Dirichlet problem for elliptic systems of second order differential equations not satisfying Ya. B. Lopatinskii's condition. Sib Math J 7, 733–748 (1966). https://doi.org/10.1007/BF00973268
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DOI: https://doi.org/10.1007/BF00973268