TY  - RPRT
TI  - Stable isotopically labeled internal standards in quantitative bioanalysis using liquid chromatography/mass spectrometry: necessity or not?
AU  - Ellen Stokvis
AU  - Hilde Rosing
AU  - Jos H Beijnen
PY  - 2005
DO  - 10.1002/rcm.1790
UR  - https://pubmed.ncbi.nlm.nih.gov/15645520/
ID  - 15645520
ER  -