Negm, Abdalla M.; El-Aal, Fatma Abd El-Maksoud Abd; Hafez, Ebtisam A., Phosphorus, Sulfur and Silicon and the Related Elements, 1995, vol. 106, # 1-4, p. 1 - 8
Negm, Abdalla M.; El-Aal, Fatma Abd El-Maksoud Abd; Hafez, Ebtisam A., Phosphorus, Sulfur and Silicon and the Related Elements, 1995, vol. 106, # 1-4, p. 1 - 8