1. Brackx, F., Delanghe, R., Sommen, F.: Clifford Analysis, Research Notes in Mathematics 76, Pitman (Advanced Publishing Program), Boston, 1982
2. Delanghe, R., Sommen, F., Souček, V.: Clifford Algebra and Spinor-Valued Functions, Kluwer Academic Publishers, Dordrecht, 1992
3. Gilbert, J., Murray, M.: Clifford Algebras and Dirac Operators in Harmonic Analysis, Cambridge University Press, Cambridge, 1991
4. Colombo, F., Sabadini, I., Sommen, F., et al.: Analysis of Dirac Systems and Computational Algebra, Birkhäuser, Boston, 2004
5. Gürlebeck, K., Habetha, K., Sprössig, W.: Holomorphic Functions in the Plane and n-Dimensional Space, Birkhäuser Verlag, Basel, 2008