A Abdulla, M., A A Hatim, N. and K. Al-Khayat, I. (2007) “Modification of gypsum products (Part I): physical and mechanical properties of adding some additives on different types of gypsum products”, Al-Rafidain Dental Journal, 7(2), pp. 206–212. doi: 10.33899/rden.2007.39747.