7Thyssen J P, Menne T, Johansen, J D. Nickel release from inexpensive jewelry and hair clasps purchased in an EU country -Are consumers sufficiently protected from nickel exposure [ J ]. Science of the Total Environment, 2009,407(20): 5 315-5 318.
8Bocca B, Forte G, Senofonte O. A pilot study on the content and the release of Ni and other allergenic metals from cheap earrings available on the Italian market [ J ]. Science of the Total Environment, 2007,388: 1-3.
9Thyssen J P, Menne T, Johansen J D. Nickel release from inexpensive jewelry and hair clasps purchased in an EU country -Are consumers sufficiently protected from nickel exposure [ J ]. Science of the Total Enviroument,2009,407(20): 5 315-5 318.
10Boeca B, Forte G, Senofonte O. A pilot study on the content and the release of Ni and other allergenic metals from cheap earrings available on the Italian market E J ]. The Science of the Total Environment, 2007,388: 1-3.
