@article{RSMUP_2005__113__179_0,
     author = {Pratelli, Aldo},
     title = {How to show that some rays are maximal transport rays in {Monge} {Problem}},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {179--201},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {113},
     year = {2005},
     mrnumber = {2168986},
     zbl = {1150.49024},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_2005__113__179_0/}
}