@article{1138035442,
author = {Hirasawa, Yoshikazu},
title = {On a singular perturbation problem for linear systems of ordinary differential equations. I.},
journal = {Kodai Math. J.},
volume = {1},
number = {1},
year = {1978},
pages = { 85-88},
language = {en},
url = {http://dml.mathdoc.fr/item/1138035442}
}
Hirasawa, Yoshikazu. On a singular perturbation problem for linear systems of ordinary differential equations. I.. Kodai Math. J., Tome 1 (1978) no. 1, pp. 85-88. http://gdmltest.u-ga.fr/item/1138035442/