@article{1077467332, author = {Protter, M. H.}, title = {A generalization of completely convex functions}, journal = {Duke Math. J.}, volume = {24}, number = {1}, year = {1957}, pages = { 205-213}, language = {en}, url = {http://dml.mathdoc.fr/item/1077467332} }
Protter, M. H. A generalization of completely convex functions. Duke Math. J., Tome 24 (1957) no. 1, pp. 205-213. http://gdmltest.u-ga.fr/item/1077467332/