2Roels H,Lauwerys R,Genent P,et al.Relationship between external and internal parameters of exposure to manganese in workers from a manganese oxide and salt producing plant [J].Am J Ind Med,1987,11:297-305.
3Lorarger S.Zayed.Environmental and occupational exposure to manganese:a multimedia assessment [J].Int Arch Occup Environ Health,1995,67:101-110.