Sharaf, Mohie A. F.; Ezat, El-Emam H. M.; Hammouda, Hamdy A. A., Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 92, # 1-4, p. 19 - 28
Sharaf, Mohie A. F.; Ezat, El-Emam H. M.; Hammouda, Hamdy A. A., Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 92, # 1-4, p. 19 - 28