@article{GDZPPN002343320,
title = {The exceptional points of a cubic curve which is symmetric in the homogeneous variables},
journal = {Mathematica Scandinavica},
volume = {2},
year = {1954},
pages = {227-236},
zbl = {0057.03602},
url = {http://dml.mathdoc.fr/item/GDZPPN002343320}
}
SELMER, ERNST S. The exceptional points of a cubic curve which is symmetric in the homogeneous variables. Mathematica Scandinavica, Tome 2 (1954) pp. 227-236. http://gdmltest.u-ga.fr/item/GDZPPN002343320/