@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/