@Book{Prantl1861,
author  = "Prantl, Carl von",
title   = "Über des Abtes Wilhelm von Hirschau (geb. 1026 gest. 1091) Philosophicae et astronomicae institutiones",
year    = "1861",
address = "München",
series  = "Sitzungsberichte",
volume  = "1861,1,1",
url     = "https://publikationen.badw.de/de/003399709",
}