@article{GDZPPN002319691, title = {Nonexistence of Curvature in Most Points of Most Convex Surfaces.}, journal = {Mathematische Annalen}, volume = {250}, year = {1980}, pages = {217-220}, zbl = {0427.53002}, url = {http://dml.mathdoc.fr/item/GDZPPN002319691} }
Zamfirescu, Tudor. Nonexistence of Curvature in Most Points of Most Convex Surfaces.. Mathematische Annalen, Tome 250 (1980) pp. 217-220. http://gdmltest.u-ga.fr/item/GDZPPN002319691/