@article{JCA_2011_18_2_JCA_2011_18_2_a1,
     author = {K. Sawatani and T. Watanabe},
     title = {Type {One} {Functions} and {Vorono{\"\i}'s} {Theorem}},
     journal = {Journal of convex analysis},
     pages = {341--351},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/JCA_2011_18_2_JCA_2011_18_2_a1/}
}