1. Palynostratigraphy of the coal–bearing Neogene deposits Graben in Büyük Menderes Western Anatolia;Akgün;Geobios,1999
2. A palynostratigraphic approach to the SW Anatolian molasse basin: Kale–Tavas molasse and Denizli molasse. Geodin;Akgün;Acta,2001
3. Palaeoclimatic evolution and vegetational changes during the Late Oligocene-Miocene period in Western and Central Anatolia (Turkey);Akgün;Palaeogeogr. Palaeoclimatol. Palaeoecol.,2007
4. Standard Practice for Preparing Coal Samples for Microscopical Analysis by Reflected Light ASTM International, West Conshohocken, PA;American Society for Testing and Materials (ASTM) D2797/D2797M,2011
5. Standard Test Method for Major and Minor Elements in Coal and Coke Ash by X-ray Fluorescence;American Society for Testing and Materials (ASTM) D4326,2011