参考文献

Choudhary, Muhammad Iqbal; Nasir, Muhammad; Khan, Shamsun N.; Atif, Muhammad; Ali, Rahat A.; Khalil, Syed M.; Atta-ur-Rahman Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences, 2007 , vol. 62, # 4 p. 593 - 599