@misc{Wiegmann1973,
author  = "Wiegmann, Klaus Werner",
title   = "Einbettung des relativen Wolffhardt-Raumes",
year    = "1973",
address = "München",
series  = "Sitzungsberichte",
volume  = "1972,4",
url     = "http://publikationen.badw.de/en/003384311",
}