Hyötyläinen Tuulia, Riekkola Marja-Liisa
Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland.
Anal Bioanal Chem. 2004 Apr;378(8):1936-8. doi: 10.1007/s00216-003-2481-1. Epub 2004 Jan 21.