@article{SM_2017_208_11_a6,
     author = {Sh. Friedland},
     title = {On {Schr\"odinger's} bridge problem},
     journal = {Sbornik. Mathematics},
     pages = {1705--1721},
     publisher = {mathdoc},
     volume = {208},
     number = {11},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2017_208_11_a6/}
}