%0 Journal Article %A Cori, R. %A Machi', A. %T Flows on hypermaps %J Glasgow mathematical journal %D 1988 %P 17-29 %V 30 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006996/ %R 10.1017/S0017089500006996 %F 10_1017_S0017089500006996