@article{GDZPPN002190311,
title = {Bounded solutions to perturbed nonlinear systems and asymptotic relationships.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {272},
year = {1975},
pages = {170-177},
zbl = {0328.34040},
url = {http://dml.mathdoc.fr/item/GDZPPN002190311}
}
Kartsatos, Athanassios G. Bounded solutions to perturbed nonlinear systems and asymptotic relationships.. Journal für die reine und angewandte Mathematik, Tome 272 (1975) pp. 170-177. http://gdmltest.u-ga.fr/item/GDZPPN002190311/