1. Old and new in Möbius groups;Ahlfors;Ann. Acad. Sci. Fenn., Ser. A 1 Math.,1984
2. On the fixed points of Möbius transformations in Rn;Ahlfors;Ann. Acad. Sci. Fenn., Ser. A 1 Math.,1985
3. Möbius transformations and Clifford numbers;Ahlfors,1985
4. Möbius transformations in Rn expressed through 2×2 matrices of Clifford numbers;Ahlfors;Complex Var. Theory Appl.,1986
5. Clifford numbers and Möbius transformations in Rn;Ahlfors,1986