@article{MAN_1879__15_156856,
     author = {Cayley},
     title = {On the correspondence of {Homographies} and {Rotations}},
     journal = {Mathematische Annalen},
     pages = {238--240},
     year = {1879},
     volume = {15},
     zbl = {11.0624.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1879__15_156856/}
}