@article{1255454118,
author = {Hale, J. K.},
title = {Linear systems of first and second order differential equations with periodic coefficients},
journal = {Illinois J. Math.},
volume = {2},
number = {1},
year = {1958},
pages = { 586-592},
language = {en},
url = {http://dml.mathdoc.fr/item/1255454118}
}
Hale, J. K. Linear systems of first and second order differential equations with periodic coefficients. Illinois J. Math., Tome 2 (1958) no. 1, pp. 586-592. http://gdmltest.u-ga.fr/item/1255454118/