1. Ihnat , M. M.S. Wolynetz Y. Thomassen M. Verlinden IUPAC interlaboratory trial on the determination of selenium in lyophilized human blood serum reference material Pure Appl. Chem. 1984
2. Ihnat , M. Y. Thomassen M.S. Wolynetz C. Veillon Trace element data reliability in clinical chemistry - interlaboratory trials and reference materials Paper 27, Metabolism of trace elements related to human diseases, Loen, Norway 1985
3. Veillon , C. S.A. Lewis K.Y. Patterson A bovine serum reference material for major, minor and trace elements Paper 28, Metabolism of trace elements related to human diseases, Loen, Norway 1985
4. Determination of selenium in human body fluids by hydride-generation atomic absorption spectrometry. Optimization of sample decomposition;Welz;Anal. Chim. Acta,1984