@article{JCA_2006_13_3_JCA_2006_13_3_a1,
     author = {D. Az\'e and J.-N. Corvellec},
     title = {Variational {Methods} in {Classical} {Open} {Mapping} {Theorems}},
     journal = {Journal of convex analysis},
     pages = {477--488},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/JCA_2006_13_3_JCA_2006_13_3_a1/}
}