1. R. Abreu, J. Bory, R. Delanghe and F. Sommen, Harmonic multivector fields and the Cauchy integral decomposition in Clifford analysis, Bull. Belg. Math. Soc. 11 (2004), 95–110.
2. L. A. Aizenberg and Sh. A. Dautov, Differential Forms Orthogonal to Holomorphic Functions or Forms, AMS, Providence, R.I., 1983.
3. A. Andreotti and C. D. Hill, E. E. Levi convexity and the H. Lewy problem, I, Ann. Scuola Norm. Sup. Pisa Cl. Sci. 26 (1972), 325–363.
4. D. Calderbank, Clifford analysis for Dirac operators on manifolds with boundary, Max-Planck-Institut für Mathematik, MPI 96–131, 1996.
5. R. Delanghe, F. Sommen and V. Souček, Clifford Algebra and Spinor-Valued Functions, Kluwer, Dordrecht, 1992.