Sharata، S. M.، و Abohajar، A. M. (2003). Use of Major Elements in Kerogen in Investigation of Depositional Environment of Petroleum Source Rocks. المجلة الجامعة، ع5 ، 1 - 19. مسترجع من http://search.mandumah.com/Record/1262309
Sharata، Salem Muftah، و Abdelinotileb Mohamed Abohajar. "Use of Major Elements in Kerogen in Investigation of Depositional Environment of Petroleum Source Rocks." المجلة الجامعة ع5 (2003): 1 - 19. مسترجع من http://search.mandumah.com/Record/1262309