@Book{Riehl1899,
author  = "Riehl, Berthold",
title   = "Zur Geschichte der frühmittelalterlichen Basilika in Deutschland",
year    = "1899",
address = "München",
series  = "Sitzungsberichte",
volume  = "1899,1,5",
url     = "https://publikationen.badw.de/de/007458437",
}