@article{EJDE_2012__2012__a51,
     author = {Schlomiuk, Dana and Vulpe, Nicolae},
     title = {Global topological classification of {Lotka-Volterra} quadratic differential systems},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2012},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a51/}
}