[GREE77]	Green, P., and R. Sibson, "Computing Dirichlet tessellations in the plane", Computational Journal, Vol. 21, 1977, pp. 168-173.
[BERG97]	Berg de, M., M. van Kreveld, M. Vermars, O. Schwarzhopf, "Computational Geometry: Algorithms and Applications", Springer-Verlag, Berlin, 1997.
[O'ROU93]	O'Rourke, J., "Computational Geometry in C", Cambridge University Press, Cambridge, 1993.
[PREP85]	Preparata, F. P., and Shamos, M.I., "Computational Geometry: an Introduction", Springer-Verlang, 1985.