%0 Journal Article %A Wohlfahrt, K. %T Macbeath's curve and the modular group %J Glasgow mathematical journal %D 1985 %P 239-247 %V 26 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006212/ %R 10.1017/S0017089500006212 %F 10_1017_S0017089500006212