@article{GDZPPN002209306,
title = {On Floquet eigenvalue problems for first order differential systems in the complex domain.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {426},
year = {1992},
pages = {87-122},
zbl = {0752.34004},
url = {http://dml.mathdoc.fr/item/GDZPPN002209306}
}
Mennicken, R.; Möller, M.; Langer, H. On Floquet eigenvalue problems for first order differential systems in the complex domain.. Journal für die reine und angewandte Mathematik, Tome 426 (1992) pp. 87-122. http://gdmltest.u-ga.fr/item/GDZPPN002209306/