@Book{Lenz1953,
author  = "Lenz, Hanfried",
title   = "Verallgemeinerungen der Schwarzschen Polygonabbildung",
year    = "1953",
address = "München",
series  = "Sitzungsberichte",
volume  = "1952,3",
url     = "https://publikationen.badw.de/en/003383690",
}