Hafez, Taghrid S.; El-Khoshnieh, Yehia O.; Mahran, Mohamed R., Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 56, # 1-4, p. 165 - 171
Hafez, Taghrid S.; El-Khoshnieh, Yehia O.; Mahran, Mohamed R., Phosphorus, Sulfur and Silicon and the Related Elements, 1991, vol. 56, # 1-4, p. 165 - 171