@article{BASM_2009_2_a2,
     author = {N. Gherstega and V. Orlov and N. Vulpe},
     title = {A complete classification of quadratic differential systems according to the dimensions of $Aff(2,\mathbb R)$-orbits},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {29--54},
     publisher = {mathdoc},
     number = {2},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2009_2_a2/}
}