@article{702184,
title = {On the properties of linear differential equations of the second order in the complex domain},
booktitle = {Differential Equations and Their Applications},
series = {GDML\_Books},
publisher = {Publishing House of the Czechoslovak Academy of Sciences},
address = {Prague},
year = {1963},
pages = {179-186},
mrnumber = {MR0174816},
zbl = {0173.10002},
url = {http://dml.mathdoc.fr/item/702184}
}
Šeda, V. On the properties of linear differential equations of the second order in the complex domain, dans Differential Equations and Their Applications, GDML_Books, (1963), pp. 179-186. http://gdmltest.u-ga.fr/item/702184/