@Misc{ espferkaw10, author = { Esposito, Luca and Ferone, Vincenzo and Kawohl, Bernd and Nitsch, Carlo and Trombetti, Cristina }, title = { The Longest Shortest Fence and Sharp Poincare-Sobolev Inequalities }, journal = { }, year = { 2010 }, pages = { }, URL = { http://cvgmt.sns.it/paper/556/ }, note = { cvgmt preprint} }