@book { Buntbuntbuntistalleswasichdenke, title = "Bunt, bunt, bunt ist alles, was ich denke", subtitle = "Ganzheitliches Gehirntraining für Senioren", author = "Ursula {Oppolzer}", year = "2011", publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG", address = ", Deutschland", url = "https://schluetersche.openpublishing.com/document/403564" }