	Authors	Year	Title
	Klug, Brühwiler & Korn	2007	Ammonoid shell structures of primary organic composition. [C. Klug, T. Brühwiler, D. Korn, G. Schweigert, A. Brayard & J. Tilsley.-] Palaeontology, 2007: 1-16, 10 text-fig., London.