Authors Year Title
Klug 2001 Life cycles of some Devonian ammonoids.
Lethaia, 34: 215-233, 12 figs., 1 tab., Oslo.
Klug 2002 Quantitative stratigraphy and taxonomy of late Emsian and Eifelian ammonoids of the eastern Anti-Atlas (Morocco).
Courier Forschungsinstitut Senckenberg, 238: 1-109, 44 fig., 13 pl., 23 tab., Frankfurt.