@article{02213838, title = {Optimality conditions and exact solutions of the two-dimensional Monge-Kantorovich problem.}, journal = {Zapiski Nauchnykh Seminarov POMI}, volume = {314}, year = {2004}, pages = {150-164}, doi = {10.1007/s10958-006-0061-6}, zbl = {1099.49028}, language = {en}, url = {http://dml.mathdoc.fr/item/02213838} }
Levin, V.L. Optimality conditions and exact solutions of the two-dimensional Monge-Kantorovich problem.. Zapiski Nauchnykh Seminarov POMI, Tome 314 (2004) pp. 150-164. doi : 10.1007/s10958-006-0061-6. http://gdmltest.u-ga.fr/item/02213838/