K. Kantnerová, M. Barthel, J. Six, L. Emmenegger, S. M. Bernasconi, and J. Mohn, “Stable Isotope Analysis of Greenhouse Gases Requires Analyte Preconcentration”, Chimia, vol. 76, no. 7-8, pp. 656–660, Aug. 2022, doi: 10.2533/chimia.2022.656.