@article{RLINA_1979_8_66_4_a0,
     author = {Ezeilo, James O.C.},
     title = {Extension of certain instability theorems for some fourth and fifth order differential equations},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali},
     pages = {239--242},
     publisher = {mathdoc},
     volume = {Ser. 8, 66},
     number = {4},
     year = {1979},
     zbl = {0484.34037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLINA_1979_8_66_4_a0/}
}