参考文献

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