@article{05348111,
title = {Unmixed bipartite graphs.},
journal = {Revista Colombiana de Matem\'aticas},
volume = {41},
year = {2007},
pages = {393-395},
zbl = {1171.05405},
language = {en},
url = {http://dml.mathdoc.fr/item/05348111}
}
Villarreal, Rafael H. Unmixed bipartite graphs.. Revista Colombiana de Matemáticas, Tome 41 (2007) pp. 393-395. http://gdmltest.u-ga.fr/item/05348111/