Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_2008_38_3a_14, author = {Z. Petrova}, title = {Oscillation {Properties} of a {Class} of {Second} {Order} {Equations}}, journal = {Novi Sad Journal of Mathematics}, pages = {113-119}, publisher = {mathdoc}, volume = {38}, number = {3}, year = {2008}, url = {http://geodesic.mathdoc.fr/item/NSJOM_2008_38_3a_14/} }
Z. Petrova. Oscillation Properties of a Class of Second Order Equations. Novi Sad Journal of Mathematics, Tome 38 (2008) no. 3. http://geodesic.mathdoc.fr/item/NSJOM_2008_38_3a_14/