@Misc{ CavHue13, author = { Cavalletti, Fabio and Huesmann, Martin }, title = { Existence and Uniqueness of optimal transport map }, journal = { Ann. Inst. H. Poincaré Anal. Non Linéaire }, year = { 2013 }, pages = { }, URL = { http://cvgmt.sns.it/paper/2064/ }, note = { cvgmt preprint} }