1. H. Begehr, ”Boundary value problems in complex analysis I, II,” Boletin de la Asosiación Matemática Venezolana XII, 65-85, 217–250 (2005).
2. H. Begehr and A. Kumar, ”Boundary value problems for the inhomogeneous polyanalytic equation I” 1, 55–71 (2005).
3. R. Prakash and A. Kumar, ”Mixed boundary value problems for the inhomogeneous polyanalytic equation” 51, 209–223 (2006).
4. Dirichlet problem for complex model partial differential equations
5. I.N. Vekua, Generalized Analytic Functions (Pergamon, Oxford, 1962).