@article{JCA_2006_13_3_JCA_2006_13_3_a11,
     author = {E. Ernst and M. Th\'era},
     title = {Global {Maximum} of a {Convex} {Function:} {Necessary} and {Sufficient} {Conditions}},
     journal = {Journal of convex analysis},
     pages = {687--694},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/JCA_2006_13_3_JCA_2006_13_3_a11/}
}