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Additional information
Kiev. Translated from Sibirskii Matematicheskii Zhurnal, Vol. 31, No. 2, pp. 76–88, March–April, 1990.
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Kovalenko, V.F., Semenov, Y.A. Tests for m-accretive closedness of a second-order linear elliptic operator. Sib Math J 31, 249–260 (1990). https://doi.org/10.1007/BF00970654
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DOI: https://doi.org/10.1007/BF00970654