1. M. P. do Carmo,Differential Geometry of Curves and Surfaces, Prentice-Hall, Englewood Cliffs, NJ, 1976.
2. N. Chiba, T. Yamanouchi, and T. Nishizeki, Linear algorithms for convex drawings of planar graphs, inProgress in Graph Theory, eds. J. A. Bondy and U. S. R. Murty, Academic Press, Toronto, 1984, pp. 153–173.
3. P. Gritzmann, The toroidal analogue to Eberhard's theorem,Mathematika 30 (1983), 274–290.
4. J. L. Gross and T. W. Tucker,Topological Graph Theory, Wiley—Interscience, New York, 1987.
5. B. Grünbaum and G. C. Shephard,Tilings and Patterns, Freeman, New York, 1987.