@article{1255378507,
author = {Hale, Jack K.},
title = {On a class of linear differential equations with periodic coefficients},
journal = {Illinois J. Math.},
volume = {1},
number = {1},
year = {1957},
pages = { 98-104},
language = {en},
url = {http://dml.mathdoc.fr/item/1255378507}
}
Hale, Jack K. On a class of linear differential equations with periodic coefficients. Illinois J. Math., Tome 1 (1957) no. 1, pp. 98-104. http://gdmltest.u-ga.fr/item/1255378507/