@article{PORMA_1971__30_2_115145,
     author = {Onuchic, Nelson},
     title = {Asymptotic equivalence between two systems of ordinary differential equations},
     journal = {Portugaliae mathematica},
     pages = {97--105},
     publisher = {mathdoc},
     volume = {30},
     number = {2},
     year = {1971},
     mrnumber = {0312005},
     zbl = {0226.34032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1971__30_2_115145/}
}