@article{RLINA_1979_8_67_1-2_a8,
     author = {Chen, Lu-San},
     title = {Some remarks on oscillation of second order differential equations},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali},
     pages = {45--52},
     publisher = {mathdoc},
     volume = {Ser. 8, 67},
     number = {1-2},
     year = {1979},
     zbl = {0473.34013},
     mrnumber = {285789},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLINA_1979_8_67_1-2_a8/}
}