Hassan, Kh. M.; El-Dean, A.M. Kamal; Youssef, M. S. K.; Atta, F. M.; Abbady, M. S.
Phosphorus, Sulfur and Silicon and the Related Elements, 1990 , vol. 47, p. 283 - 289

Hassan, Kh. M.; El-Dean, A.M. Kamal; Youssef, M. S. K.; Atta, F. M.; Abbady, M. S.
Phosphorus, Sulfur and Silicon and the Related Elements, 1990 , vol. 47, p. 283 - 289