@article{GDZPPN000364592, title = {Toughness and Delaunay Triangulations.}, journal = {Discrete \& computational geometry}, volume = {5}, year = {1990}, pages = {575-602}, zbl = {0727.05040}, url = {http://dml.mathdoc.fr/item/GDZPPN000364592} }
Dillencourt, M.B. Toughness and Delaunay Triangulations.. Discrete & computational geometry, Tome 5 (1990) pp. 575-602. http://gdmltest.u-ga.fr/item/GDZPPN000364592/