Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1971__119_171479, author = {Richard Holmes}, title = {Smoothness {Indices} for {Convex} {Functions} and the {Unique} {Hahn-Banach} {Extension} {Problem.}}, journal = {Mathematische Zeitschrift}, pages = {95--110}, publisher = {mathdoc}, volume = {119}, year = {1971}, zbl = {0196.13605}, url = {http://geodesic.mathdoc.fr/item/MZ_1971__119_171479/} }
Richard Holmes. Smoothness Indices for Convex Functions and the Unique Hahn-Banach Extension Problem.. Mathematische Zeitschrift, Tome 119 (1971), pp. 95-110. http://geodesic.mathdoc.fr/item/MZ_1971__119_171479/