@Book{Künneth1923,
author  = "Künneth, Hermann",
title   = "Zur topologischen Untersuchung geometrischer Gebilde",
year    = "1923",
address = "München",
series  = "Sitzungsberichte",
volume  = "1922,20",
url     = "https://publikationen.badw.de/en/003399287",
}