@article{10_4153_CMB_1979_011_4,
     author = {Nishi, Akihiro},
     title = {An {Elementary} {Proof} of {Johnson{\textendash}Dulmage{\textendash}Mendelsohn's} {Refinement} of {Birkhoff's} {Theorem} on {Doubly} {Stochastic} {Matrices}},
     journal = {Canadian mathematical bulletin},
     pages = {81--86},
     year = {1979},
     volume = {22},
     number = {1},
     doi = {10.4153/CMB-1979-011-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1979-011-4/}
}