@article{JEMS_2013_15_4_a0,
     author = {Alessio Figalli and Young-Heon Kim and Robert J. McCann},
     title = {Regularity of optimal transport maps on multiple products of spheres},
     journal = {Journal of the European Mathematical Society},
     pages = {1131--1166},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {2013},
     doi = {10.4171/jems/388},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/388/}
}