@Book{Föppl1912,
author  = "Föppl, August",
title   = "Die Biegung einer kreisförmigen Platte",
year    = "1912",
address = "München",
series  = "Sitzungsberichte",
volume  = "1912,7",
url     = "https://publikationen.badw.de/en/003395732",
}