@Book{Voss1918,
author  = "Voss, Aurel",
title   = "Zur Theorie der Kurven im Raume",
year    = "1918",
address = "München",
series  = "Sitzungsberichte",
volume  = "1918,12",
url     = "https://publikationen.badw.de/de/003399178",
}