@article{702231,
title = {Global properties of the $n$th order linear differential equations},
booktitle = {Equadiff IV},
series = {GDML\_Books},
publisher = {Springer-Verlag},
address = {Berlin},
year = {1979},
pages = {[309]-317},
mrnumber = {MR0693139},
zbl = {0402.34007},
url = {http://dml.mathdoc.fr/item/702231}
}
Neuman, F. Global properties of the $n$th order linear differential equations, dans Equadiff IV, GDML_Books, (1979), pp. [309]-317. http://gdmltest.u-ga.fr/item/702231/