1. To whom correspondence should be addressed.
2. Chevalley C.C., “The Algebraic Theory of Spinors”, Columbia University Press (New York, 1954).
3. Artin E., “Geometric Algebra”, Interscience (New York, 1957, 1988).
4. Riesz M., “Clifford Number and Spinors”, The Institute for Fluid Dynamics andApplied Mathematics, Lecture Series No.38 (University of Maryland, 1958).
5. Crumeyrolle A.,Ann. Inst. Henri Poincaré,A11, 19 (1969);A14, 309 (1971).