1. Emsian (Lower Devonian) conodont stratigraphy and correlation of the Anti-Atlas (Southern Morocco);Aboussalam;Bulletin of Geosciences,2015
2. Devonian Events and Biostratigraphy of South China: Conodont Zonation and Correlation, Bio-event and Chemo-event, Milankovitch Cycle and Nickel-episode;Bai,1994
3. Emsian chronostratigraphy — Preliminary new data and a review of the Tafilalt (SE Morocco);Becker;Subcommission on Devonian Stratigraphy Newsletter,2011
4. The Devonian Period;Becker,2012
5. Description of certain Lower Devonian platform conodonts of the Spanish Central Pyrenees;Boersma;Leidse Geologische Mededelingen,1973