@book { DieHartzReformenausdemBlickwinkelderSystemtheorie, title = "Die Hartz-Reformen aus dem Blickwinkel der Systemtheorie", author = "Vera {Hillemann}", year = "2008", publisher = "Diplom.de", address = "Hamburg, Deutschland", doi = "10.3239/9783836616898", url = "https://m.diplom.de/document/226009" }