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@article{MM2_1992__75_4_155722, author = {G. Dal Maso and Anneliese Defranceschi}, title = {A characterization of {C1-convex} sets in {Sobolev} spaces.}, journal = {Manuscripta mathematica}, pages = {247--272}, publisher = {mathdoc}, volume = {75}, number = {4}, year = {1992}, zbl = {0766.46014}, url = {http://geodesic.mathdoc.fr/item/MM2_1992__75_4_155722/} }
G. Dal Maso; Anneliese Defranceschi. A characterization of C1-convex sets in Sobolev spaces.. Manuscripta mathematica, Tome 75 (1992) no. 4, pp. 247-272. http://geodesic.mathdoc.fr/item/MM2_1992__75_4_155722/