Literature Cited
A. V. Bitsadze, Foundations of the Theory of Analytic Functions of a Complex Variable [in Russian], Nauka, Moscow (1972).
V. V. Golubev, Lectures on the Analytic Theory of Differential Equations, [in Russian], Gostekhizdat, Moscow (1950).
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Additional information
K. Preikshas Shyaulyai Pedagogic Institute. Translated from Litovskii Matematicheskii Sbornik (Lietuvos Matematikos Rinkinys), Vol. 28, No. 4, pp. 655–661, October–December, 1988.
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Gedvilaitė, A., Kaklauskas, L. & Jurgaitis, D. A first-order elliptic system with semiregular degeneracy. Lith Math J 28, 327–331 (1988). https://doi.org/10.1007/BF00972214
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DOI: https://doi.org/10.1007/BF00972214