@Misc{ BraPet12, author = { Brasco, Lorenzo and Petrache, Mircea }, title = { A continuous model of transportation revisited }, journal = { Zap. Nauchn. Sem. S.-Peterburg. Otdel. Mat. Inst. Steklov. }, year = { 2013 }, volume = { 411 }, pages = { 5-37 }, URL = { http://cvgmt.sns.it/paper/2013/ }, note = { cvgmt preprint} }