1. Elementa doctrinae solidorum et Demonstratio nonnularum insignium proprietatum quibus solida heddris planis inclusa sunt praedita, L. Euler, included in the Proceedings of the St. Petersburg Academy, 1758.
2. (a) M. Henle, A Combinatorial Introduction to Topology, 1st edn. (W.H. Freeman and Company, San Francisco, CA, 1979).
3. (b) A.F. Wells, Three Dimensional Nets and Polyhedra, 1st edn. (Wiley and Sons Inc., New York, 1977).
4. A.F. Wells, The geometrical basis of crystal chemistry: (a) Part 1, A.F. Wells Acta Cryst. 7 (1954) 535. (b) Part 2, A.F. Wells Acta Cryst. 7 (1954) 545. (c) Part 3, A.F. Wells Acta Cryst. 7 (1954) 842. (d) Part 4, A.F. Wells, Acta Cryst. 7 (1954) 849. (e) Part 5, A.F. Wells, Acta Cryst. 8 (1955) 32. (f) Part 6, A.F. Wells, Acta Cryst. 9 (1956) 23. (g) Part 7, Wells, A.F. and R.R. Sharpe, Acta Cryst. 16 (1963) 857. (h) Part 8, A.F. Wells Acta Cryst. 18 (1965) 894. (i) Part 9, A.F. Wells, Acta Cryst. B24 (1968) 50. (j) Part 10, A.F. Wells, Acta Cryst. B25 (1969) 1711. (k) Part 11, A.F. Wells Acta Cryst. B28 (1972) 711. (l) Part 12, A.F. Wells, Acta Cryst. B32 (1976) 2619. (m) A.F. Wells, Three Dimensional Nets and Polyhedra, 1st edn (Wiley and Sons Inc., New York, 1977). (n) A.F. Wells, Further Studies of Three-dimensional Nets, American Crystallographic Association, Monograph Number 8, 1st edn (American Crystallographic Association Press, PA 1979). Note that unfortunately the author could not locate direct references to the work of Schläfli in topology, the references to Wells are indirect but refer to Schläfli’s work.
5. (a) M. Wenninger, Dual Models, 1st edn (Cambridge University Press, Cambridge, 1983).