@article{MAN_1899__51_157922,
     author = {F. Morley},
     title = {Some {Polar} {Constructions}},
     journal = {Mathematische Annalen},
     pages = {410--416},
     publisher = {mathdoc},
     volume = {51},
     year = {1899},
     zbl = {29.0466.06},
     url = {http://geodesic.mathdoc.fr/item/MAN_1899__51_157922/}
}