@Book{Perron1947,
author  = "Perron, Oskar",
title   = "Ein Analogon zu einem Satz von Minkowski",
year    = "1947",
address = "München",
series  = "Sitzungsberichte",
volume  = "1945,9=1945/46,9.",
url     = "https://publikationen.badw.de/de/003198599",
}