@Book{Jacob1909,
author  = "Jacob, Georg",
title   = "Die Bektaschijje in ihrem Verhältnis zu verwandten Erscheinungen",
year    = "1909",
address = "München",
series  = "Abhandlungen",
volume  = "24,4",
url     = "https://publikationen.badw.de/en/003208571",
}