@article{1178227373,
author = {Nomizu, Katsumi and Sasaki, Takeshi},
title = {On certain quartic forms for affine surfaces},
journal = {Tohoku Math. J. (2)},
volume = {44},
number = {1},
year = {1992},
pages = { 25-33},
language = {en},
url = {http://dml.mathdoc.fr/item/1178227373}
}
Nomizu, Katsumi; Sasaki, Takeshi. On certain quartic forms for affine surfaces. Tohoku Math. J. (2), Tome 44 (1992) no. 1, pp. 25-33. http://gdmltest.u-ga.fr/item/1178227373/