1. 1) Peter R. Cromwell: “Polyhedra,” ISBN 0-521-55432-2, Cambridge University Press (June 1997).
2. 2) H. S. M. Coxeter: “Introduction to Geometry Second Edition,” ISBN 0-471-50458-0, John Wiley & Sons (February 1989).
3. 3) H. S. M. Coxeter: “Regular Polytopes,” ISBN 0-486-61480-8, Dover (June 1973).