Awad, Ibrahim M. A.; Abdel-Rahman, Abdu E.; Bakhite, Etify A., Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 61, # 3.4, p. 305 - 318
Awad, Ibrahim M. A.; Abdel-Rahman, Abdu E.; Bakhite, Etify A., Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 61, # 3.4, p. 305 - 318