@article{10_4153_CJM_1973_048_x,
     author = {Edwards, C. S.},
     title = {Some {Extremal} {Properties} of {Bipartite} {Subgraphs}},
     journal = {Canadian journal of mathematics},
     pages = {475--485},
     year = {1973},
     volume = {25},
     number = {3},
     doi = {10.4153/CJM-1973-048-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-048-x/}
}