[1] I. N. Vekua, “Generalized Analytic Functions,” Pergamon, Oxford, 1962.
[2] G. C. Wen and H. Begehr, “Boundary Value Problems for Elliptic Equations and Systems,” Longman Scientific and Technical Company, Harlow, 1990.
[3] A. V. Bitsadze, “Some Classes of Partial Differential Equations,” Gordon and Breach, New York, 1988.
[4] G. C. Wen, “Conformal Mappings and Boundary Value Problems,” Translations of Mathematics Monographs 106, American Mathematical Society, Providence, 1992.
[5] G. C. Wen, D. C. Chen and Z. L. Xu, “Nonlinear Complex Analysis and Its Applications,” Mathematics Monograph Series 12, Science Press, Beijing, 2008.
[6] G. C. Wen, “Approximate Methods and Numerical Analysis for Elliptic Complex Equations,” Gordon and Breach, Amsterdam, 1999.
[7] G. C. Wen, “Linear and Quasilinear Complex Equations of Hyperbolic and Mixed Type,” Taylor & Francis, London, 2002. doi:10.4324/9780203166581
[8] G. C. Wen, “Recent Progress in Theory and Applications of Modern Complex Analysis,” Science Press, Beijing, 2010.