@Book{Riefler1870,
author  = "Riefler, Sigmund",
title   = "Ueber das Passage-Prisma",
year    = "1870",
address = "München",
series  = "Sitzungsberichte",
volume  = "1870,1,25",
url     = "https://publikationen.badw.de/en/003392923",
}