@article{EJDE_1997__1997__a11,
     author = {Avis,  Rafael and Naulin,  Ra\'ul},
     title = {Asymptotic instability of nonlinear differential equations},
     journal = {Electronic journal of differential equations},
     year = {1997},
     volume = {1997},
     zbl = {0888.34045},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1997__1997__a11/}
}