1. Proposals for an international substage subdivision of the Frasnian;Becker;SDS Newslett.,1998
2. Devonian conodont and ammonoid succession of the eastern Tafilalt (Ouidane Chebbi section), Anti-Atlas, Morocco;Belka;Acta Geol. Pol.,1999
3. Conodonts from the Grassy Creek Shale of Missouri;Branson;Univ. Missouri Stud.,1934
4. Les faunes du Dévonien de l’Ougarta (Sahara occidental, Algérie);Boumendjel;Ann. Soc. Géol. Nord.,1997
5. Conodont succession and biofacies in upper Frasnian formations (Devonian) from the southern and central parts of the Dinant Synclinorium (Belgium): (timing of facies shifting and correlation with late Frasnian events);Bultynck;Bull. Inst. Roy. Sci. Nat. Belg. Sci. Terre,1998