@Book{Steuerwald1936,
author  = "Steuerwald, Rudolf",
title   = "Über Enneper'sche Flächen und Bäcklund'sche Transformation",
year    = "1936",
address = "München",
series  = "Abhandlungen",
volume  = "N.F., 40",
url     = "https://publikationen.badw.de/en/003071367",
}