@article{MZ_1973__132_171909,
     author = {Colin Maclachlan},
     title = {On a {Conjecture} of {Magnus} on the {Hurwitz} {Monodromy} {Group.}},
     journal = {Mathematische Zeitschrift},
     pages = {45--50},
     publisher = {mathdoc},
     volume = {132},
     year = {1973},
     zbl = {0255.30006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__132_171909/}
}