1. Middle and Late Carboniferous Chonetacea (Brachiopoda) of the Russian platform;Afanasjeva;Paleontological Journal,1975
2. Agrali, B., Akyol, E., 1967. Étude palynologique de charbons de Hazro et considérations sur l’âge des horizons lacustres de Permo-Carbonifère. Mineral Research Exploration Institute, Turkey, Bull (Foreign Edition), vol. 68, pp. 1–26.
3. Palynologie du Permien inférieur de Sariz (Kayseri) et de Pamucak Yaylasi (Antalya-Turquie) et contamination Jurassique observée, due aux Ruisseaux “Pamucak” et “Goynuk”;Akyol;Pollen et Spores,1975
4. Permian brachiopods from Karakorum (Pakistan). Pt.1;Angiolini;Rivista Italiana di Paleontologia e Stratigrafia,1995
5. Lower Permian brachiopods and palynomorphs from the Dorud Formation (Alborz Mountains, north Iran): new evidence for their palaeobiogeographic affinity;Angiolini;Fossils and Strata,2008