@Book{Stein1967,
author  = "Stein, Karl",
title   = "Über die Äquivalenz meromorpher und rationaler Funktionen",
year    = "1967",
address = "München",
series  = "Sitzungsberichte",
volume  = "1966,9",
url     = "https://publikationen.badw.de/en/003384185",
}