1Lennart Hardell,Marit Danell,Carl-Axel ?ngqvist,Stefan L. Marklund,Mats Fredriksson,Anna-Lena Zakari,Arne Kjellgren. Levels of selenium in plasma and glutathione peroxidase in erythrocytes and the risk of breast cancer[J] 1993,Biological Trace Element Research(2):99～108
