@article{RLIN_1991_9_2_4_a1,
     author = {Sabatini, Marco},
     title = {A sufficient condition for a polynomial centre to be global},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
     pages = {281--285},
     publisher = {mathdoc},
     volume = {Ser. 9, 2},
     number = {4},
     year = {1991},
     zbl = {0757.34025},
     mrnumber = {55521},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLIN_1991_9_2_4_a1/}
}