@article{PMID:, author = {Vielhauer, Oliver and Zakhartsev, Maksim and Horn, Thomas and Takors, Ralf and Reuss, Matthias}, title = {Simplified absolute metabolite quantification by gas chromatography–isotope dilution mass spectrometry on the basis of commercially available source material}, journal = {Journal of Chromatography B}, year = {2011}, volume = {}, }