1. Abramowitz, M., Stegun, I.A.: Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables. Wiley, New York (1972)
2. Research Notes in Mathematics;F Brackx,1982
3. Delanghe, R., Sommen, F., Souček, V.: Clifford algebra and spinor-valued functions. A function theory for the Dirac operator. In: Brackx, F., Constales, D. (eds.) Mathematics and Its Applications, vol. 53. Kluwer, Dordrecht (1992)
4. Eriksson, S.L., Leutwiler, H.: Hypermonogenic functions in Clifford analysis and their applications in mathematical physics. Clifford Anal. 2, 287–302 (2000)
5. Leutwiler, H.: Generalized Function Theory. Clifford Analysis and Applications (Tampere 2006). Tampere University of Technology Institute of Mathematics, Research Report No. 82 1-23 (2006)