New discoveries of xenacanth sharks from the Late Carboniferous of Spain (Puertollano Basin) and Early Permian of Germany (Saar-Nahe Basin): Implications for the phylogeny of xenacanthiform and anacanthous sharks. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 205(1), 1–31
DOI: 10.1127/njgpa/205/1997/1
The Late Carboniferous and Permian: Aquatic vertebrate zonation in Southern Spain and German basins. Courier Forschungsinstitut Senckenberg, 223, 543–561
Neue Rekonstruktionen xenacanthider Haie aus dem Permokarbon des Saar-Nahe-Beckens (SW-Deutschland). Mitteilungen der Pollichia, 90, 19–28
