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• [2] Lipman Bers, Partial differential equations and generalized analytic functions, Proc. Nat. Acad. Sci. U. S. A. 36 (1950), 130–136. MR 0036852
• [3] Jesse Douglas, Solution of the problem of Plateau, Trans. Amer. Math. Soc. 33 (1931), no. 1, 263–321. MR 1501590, https://doi.org/10.1090/S0002-9947-1931-1501590-9
• [4] Griffith C. Evans, Complements of Potential Theory. Part II, Amer. J. Math. 55 (1933), no. 1-4, 29–49. MR 1506942, https://doi.org/10.2307/2371108
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• [8] E. Goursat, Cours d'analyse mathématique, Paris, vol. 3, 1923.
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Bibliography

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S. Agmon and L. Bers, The expansion theorem for pseudo-analytic functions, Proc. Amer. Math. Soc. vol. 3 (1952) pp. 757-767. MR 0057349 (15:213b)

[2]

L. Bers, Partial differential equations and generalized analytic functions, Proc. Nat. Acad. Sci. U.S.A. vol. 36 (1950) pp. 130-136. Second note, ibid. vol. 37 (1951) pp. 42-47. MR 0036852 (12:173d)

[3]

Jesse Douglas, Solution of the problem of Plateau, Trans. Amer. Math. Soc. vol. 33 (1931) pp. 263-321. MR 1501590

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G. C. Evans, Complements of potential theory, II, Amer. J. Math. vol. 55 (1933) pp. 29-49. MR 1506942

[5]

-, Fundamental points of potential theory, Rice Institute Pamphlets, vol. 7, No. 4 (1920) pp. 252-329.

[6]

J. J. Gergen and F. G. Dressel, Mapping by -regular functions, Duke J. Math. vol. 18 (1951) pp. 185-210. MR 0050019 (14:262g)

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-, Uniqueness for -regular mapping, Duke Math J. vol. 19 (1952) pp. 435-444. MR 0050020 (14:262h)

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E. Goursat, Cours d'analyse mathématique, Paris, vol. 3, 1923.

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Oliver Dimon Kellogg, Foundations of potential theory, Berlin, 1929.

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Charles B. Morrey, Jr., On the solutions of quasilinear elliptic partial differential equations, Trans. Amer. Math. Soc. vol. 43 (1938) pp. 126-166. MR 1501936

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L. Tonelli, Sulla quadratura della superficie, Atti della Reale Accademia dei Lincei (6) vol. 3 (1926) pp. 357-362, 445-450, 633-638, 714-719.