@article{MAN_1899__52_157941,
     author = {W. Burnside},
     title = {Note on the simple group of order 504},
     journal = {Mathematische Annalen},
     pages = {174--176},
     publisher = {mathdoc},
     volume = {52},
     year = {1899},
     zbl = {30.0143.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1899__52_157941/}
}