@article{1181072107,
author = {Gasull, A. and Prohens, R.},
title = {On Quadratic Systems with a Degenerate Critical Point},
journal = {Rocky Mountain J. Math.},
volume = {26},
number = {4},
year = {1996},
pages = { 135-155},
language = {en},
url = {http://dml.mathdoc.fr/item/1181072107}
}
Gasull, A.; Prohens, R. On Quadratic Systems with a Degenerate Critical Point. Rocky Mountain J. Math., Tome 26 (1996) no. 4, pp. 135-155. http://gdmltest.u-ga.fr/item/1181072107/