@article{JCA_2010_17_2_JCA_2010_17_2_a16,
     author = {J. Jer\'onimo-Castro and L. Montejano},
     title = {Chakerian-Klamkin {Type} {Theorems}},
     journal = {Journal of convex analysis},
     pages = {643--649},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/JCA_2010_17_2_JCA_2010_17_2_a16/}
}