Awad, Ibrahim M. A.; Abdel-Rahman, Abdu E.; Bakhite, Etify A., Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 54, # 1/4, p. 63 - 71
Awad, Ibrahim M. A.; Abdel-Rahman, Abdu E.; Bakhite, Etify A., Phosphorus, Sulfur and Silicon and the Related Elements, 1990, vol. 54, # 1/4, p. 63 - 71