@article{JEMS_2007_9_1_a4,
     author = {Patrick Bernard and Boris Buffoni},
     title = {Optimal mass transportation and {Mather} theory},
     journal = {Journal of the European Mathematical Society},
     pages = {85--121},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {2007},
     doi = {10.4171/jems/74},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/74/}
}