@Book{Voss1919,
author  = "Voss, Aurel",
title   = "Zur Theorie der Kanalflächen",
year    = "1919",
address = "München",
series  = "Sitzungsberichte",
volume  = "1919,18",
url     = "https://publikationen.badw.de/de/003395431",
}