%0 Journal Article %A Hemminger, Robert L. %T Isomorphism-induced line isomorphisms on pseudographs %J Czechoslovak Mathematical Journal %D 1971 %P 672-679 %V 21 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101067/ %R 10.21136/CMJ.1971.101067 %G en %F 10_21136_CMJ_1971_101067