1. H. Begehr Riemann-Hilbert boundary value problems in ℂ n , in Complex Methods for Partial Differential and Integral Equations, Editors: H. Begehr A. Çelebi and W. Tutschke, Kluwer Academic Publishers, 1999, 59–84.
2. H. Begehr and D. Q. Dai, Spatial Riemann problem for analytic functions of two complex variables, J. Anal. Appl. 18 (1999), 827–837.
3. H. Begehr and A. Dzhuraev, An introduction to Several Complex Variables and Partial Differential Equations, Pitman Monographs and Surveys in Pure and Applied Mathematics 88, Addison Wesley, 1997.
4. H. Begehr and A. Dzhuraev, Schwarz problem for Cauchy Riemann system in several complex variables, in Analysis and Topology Editors: C. Andreian Cazacu, et al., World Scientific, 1998, 63–114.
5. H. Begehr, Complex Analytic Methods for Partial Differential Equations, World Scientific, 1994.