1. T. M. A. ElAttar, 1970 .Transformation of hormonal steroids in human gingiva. Excerpta Medica International Congress Series, Abstract No.270, III International Congress on Hormonal Steroids.
2. Metabolism of Progesterone -7α-3H in Vitro in Human Gingiva with Periodontitis
3. T. M. A. ElAttar, and G. D. Roth . 1972 .Characteristic byconversion of progesterone in human gingiva with chronic periodontitis. International Association for Dental Research Abstract # 772.
4. GINGIVAL INFLAMMATION AND FEMALE SEX HORMONES.