@article{JCA_2011_18_3_JCA_2011_18_3_a1,
     author = {L. Yao},
     title = {An affirmative answer to a problem posed by {Zalinescu}},
     journal = {Journal of convex analysis},
     pages = {621--626},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/JCA_2011_18_3_JCA_2011_18_3_a1/}
}