Reference

Philippe Gerrienne, Muriel Fairon-Demaret, Jean Galtier, Hubert Lardeux, Brigitte Meyer-Berthaud, Serge Regnault, Philippe Steemans (1999): Plants Associated with Tentaculites in a New Early Devonian Locality from Morocco – Abhandlungen der Geologischen Bundesanstalt in Wien – 54: 323 - 335.