@article{JCA_2013_20_1_JCA_2013_20_1_a15,
     author = {L. Esposito and C. Nitsch and C. Trombetti},
     title = {Best {Constants} in {Poincar\'e} {Inequalities} for {Convex} {Domains}},
     journal = {Journal of convex analysis},
     pages = {253--264},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2013},
     url = {http://geodesic.mathdoc.fr/item/JCA_2013_20_1_JCA_2013_20_1_a15/}
}