@article{JCA_2009_16_3_JCA_2009_16_3_a10,
     author = {E. Ernst and M. Volle},
     title = {When is a {Convex} {Cone} the {Cone} of all the {Half-Lines} {Contained} in a {Convex} {Set?}},
     journal = {Journal of convex analysis},
     pages = {749--766},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {2009},
     url = {http://geodesic.mathdoc.fr/item/JCA_2009_16_3_JCA_2009_16_3_a10/}
}