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Additional information
Translated from Sibirskii Matematicheskii Zhurnal, Vol. 7, No. 3, pp. 512–522, May–June, 1966.
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Bakhtin, I.A. Existence and quantity of solutions of equations with positive operators. Sib Math J 7, 414–422 (1966). https://doi.org/10.1007/BF00966239
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DOI: https://doi.org/10.1007/BF00966239