@Book{Hornich1965,
author  = "Hornich, Hans",
title   = "Über gewöhnliche lineare Differentialgleichungen von hoher Ordnung",
year    = "1965",
address = "München",
series  = "Sitzungsberichte",
volume  = "1964,3",
url     = "https://publikationen.badw.de/en/003384127",
}