TY  - RPRT
TI  - Direct quantification in bioanalytical LC-MS/MS using internal calibration via analyte/stable isotope ratio.
AU  - Lars B Nilsson
AU  - Göran Eklund
PY  - 2006
DO  - 10.1016/j.jpba.2006.09.030
UR  - https://pubmed.ncbi.nlm.nih.gov/17084056/
ID  - 17084056
ER  -