@article {6642,
	title = {"Stability of  Zirconium  Passive Films  in Nitric  and  Sulphuric  Acid  Solutions " .},
	journal = {Electrochim. Acta },
	volume = {39},
	year = {1994},
	pages = {2611},
	author = {S. M. Abd El- Metaal and N. H. Hilal and W. A. Badawy}
}
