@article{MZ_1971__120_171530,
     author = {Judita Cofman},
     title = {Simple {Groups} and {M\"obius} {Planes} of {Even} {Order.}},
     journal = {Mathematische Zeitschrift},
     pages = {299--306},
     publisher = {mathdoc},
     volume = {120},
     year = {1971},
     zbl = {0231.05025},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__120_171530/}
}