@article{1181069943,
author = {Roeder, Roland K.W.},
title = {On Poincar\'e's Fourth and Fifth Examples of Limit Cycles at Infinity},
journal = {Rocky Mountain J. Math.},
volume = {33},
number = {3},
year = {2003},
pages = { 1057-1082},
language = {en},
url = {http://dml.mathdoc.fr/item/1181069943}
}
Roeder, Roland K.W. On Poincaré's Fourth and Fifth Examples of Limit Cycles at Infinity. Rocky Mountain J. Math., Tome 33 (2003) no. 3, pp. 1057-1082. http://gdmltest.u-ga.fr/item/1181069943/