@article{BASM_2003_2_a6,
     author = {Iurie Calin},
     title = {On rational bases of $GL(2,\mathbb{R})$-comitants of planar polynomial systems of differential equations},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {69--86},
     publisher = {mathdoc},
     number = {2},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2003_2_a6/}
}