@Book{Zuser1961,
author  = "Zuser, Karl",
title   = "Die Riemannsche Fläche des Zweikörperproblems",
year    = "1961",
address = "München",
series  = "Sitzungsberichte",
volume  = "1960,7",
url     = "https://publikationen.badw.de/de/003384038",
}