@article{02174298, title = {Linear ODEs and }, journal = {Lobachevskii Journal of Mathematics}, volume = {17}, year = {2005}, pages = {147-210}, zbl = {1086.34010}, language = {en}, url = {http://dml.mathdoc.fr/item/02174298} }
Jensen, Cathrine V. Linear ODEs and . Lobachevskii Journal of Mathematics, Tome 17 (2005) pp. 147-210. http://gdmltest.u-ga.fr/item/02174298/