@Book{RufGrabmann1930,
author  = "Ruf, Paul [Sonst.] and Grabmann, Martin [Sonst.]",
title   = "Ein neuaufgefundenes Bruchstück der Apologia Abaelards",
year    = "1930",
address = "München",
series  = "Sitzungsberichte",
volume  = "1930,5",
url     = "https://publikationen.badw.de/en/006331605",
}