@misc{10_1017_S0017089500006583,
     title = {Macbeath's {Curve} and the {Modular} {Group}},
     journal = {Glasgow mathematical journal},
     pages = {241--241},
     year = {1986},
     volume = {28},
     number = {2},
     doi = {10.1017/S0017089500006583},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006583/}
}