1. AREF, M. A. M., 1988, Petrological and sedimentological studies on Gemsa Miocene sequence and associated sulfur deposits, Red Sea, Egypt: Unpublished M. Sc. Thesis, Cairo Univ., 149 p.
2. ARER, M. A. M., 1992, Petrological and sedimentological studies on Gemsa Miocene sequence and associated sulfur deposits, Red Sea, Egypt: Unpublished M. Sc. Thesis, Cairo Univ., 149 p.
3. AREF, M. A. M., 1992, Petrological and sedimentological studies on some sulfur bearing evaporite deposits on the western side of the Gulf of Suez, Egypt: Unpublished Ph. D. Thesis, Cairo Univ., 355 p.
4. AREF, M. A. M., 1994, Petrographic criteria for the recognition of sulfur genesis: 2nd Int. Conf. on Geology of the Arab World, Cairo Univ., Abstract.
5. BODENLOS, A. J., 1973, Sulfur, in United States mineral resources: United States Geological Survey Prof. Paper 820, p. 605–618.