@article{1225114181,
author = {Schlomiuk, Dana and Vulpe, Nicolae},
title = {Integrals and Phase Portraits of Planar Quadratic Differential Systems With Invariant Lines of at Least Five Total Multiplicity},
journal = {Rocky Mountain J. Math.},
volume = {38},
number = {2},
year = {2008},
pages = { 2015-2075},
language = {en},
url = {http://dml.mathdoc.fr/item/1225114181}
}
Schlomiuk, Dana; Vulpe, Nicolae. Integrals and Phase Portraits of Planar Quadratic Differential Systems With Invariant Lines of at Least Five Total Multiplicity. Rocky Mountain J. Math., Tome 38 (2008) no. 2, pp. 2015-2075. http://gdmltest.u-ga.fr/item/1225114181/