@article{03654572,
title = {A stability theory for perturbed differential equations.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2},
year = {1979},
pages = {283-297},
doi = {10.1155/S0161171279000259},
zbl = {0421.34055},
language = {en},
url = {http://dml.mathdoc.fr/item/03654572}
}
Gordon, Sheldon P. A stability theory for perturbed differential equations.. International Journal of Mathematics and Mathematical Sciences, Tome 2 (1979) pp. 283-297. doi : 10.1155/S0161171279000259. http://gdmltest.u-ga.fr/item/03654572/