@article{BASM_2006_1_a6,
     author = {Natalia Gherstega},
     title = {Functional bases of centro-affine invariants for the three-dimensional quadratic differential systems},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {57--64},
     publisher = {mathdoc},
     number = {1},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2006_1_a6/}
}