@article{GDZPPN002200724,
title = {Representations of solutions of periodic second order linear differential equations.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {341},
year = {1983},
pages = {1-21},
zbl = {0524.34007},
url = {http://dml.mathdoc.fr/item/GDZPPN002200724}
}
Laine, Ilpo; Bank, Steven B. Representations of solutions of periodic second order linear differential equations.. Journal für die reine und angewandte Mathematik, Tome 341 (1983) pp. 1-21. http://gdmltest.u-ga.fr/item/GDZPPN002200724/