1. Bool, F.H., Kist, J.R., et al,M.C. Escher: His Life and Complete Graphic Work, Abradale, 1981.
2. Coxeter, H.S.M., “Crystal Symmetry and Its Generalizations,” in A Symposium on Symmetry,The Transactions of the Royal Society of Canada 51, ser. 3, sec. 3 (June 1957), 1–13.
3. Coxeter, H.S.M.,Introduction to geometry, Second edition. John Wiley and Sons, Inc., New York-London-Sydney, 1969.
4. Coxeter, H.S.M., Angels and Devils, inThe Mathematical Gardner, Wadsworth International, Boston. 197–211, 1981.
5. Coxeter, H.S.M., The trigonometry of Escher’s woodcut “Circle Limit III”,Math. Intelligencer 18 (1996), no. 4, 42–46.