%0 Journal Article %A Edwards, C. S. %T Some Extremal Properties of Bipartite Subgraphs %J Canadian journal of mathematics %D 1973 %P 475-485 %V 25 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-048-x/ %R 10.4153/CJM-1973-048-x %F 10_4153_CJM_1973_048_x