@article{MS2_1954__2_165545,
     author = {ERNST S. SELMER},
     title = {The exceptional points of a cubic curve which is symmetric in the homogeneous variables},
     journal = {Mathematica Scandinavica},
     pages = {227--236},
     year = {1954},
     volume = {2},
     zbl = {0057.03602},
     url = {http://geodesic.mathdoc.fr/item/MS2_1954__2_165545/}
}