1. Clifford Analysis;Brackx,1982
2. An Introduction to Clifford Analysis;Cnops,1995
3. Slice monogenic functions;Colombo;Isr. J. Math.,2009
4. Noncommutative Functional Calculus. Theory and Applications of Slice Hyperholomorphic Functions;Colombo,2011
5. Funzioni regolari nell'algebra di Cayley;Dentoni;Rend. Semin. Mat. Univ. Padova,1974