Citation: M. Otto, Vertebrate fossil of the Middle Devonian (Eifelian) Muhlenberg Formation in the Bergisches Land; northwestern Germany, Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 71(1/2), 1997, pp. 107-116
Citation: M. Otto, New finds vertebrates in the Middle Devonian Brandenberg Group (Sauerland, Northwest Germany), Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 72(1/2), 1998, pp. 117-134