KEITH J. GOODMAN ET AL: 'Curve Fitting for Restoration of Accuracy for Overlapping Peaks in Gas Chromatography/Combustion Isotope Ratio Mass Spectrometry', ANALYTICAL CHEMISTRY, vol. 66, no. 8, 15 April 1994 (1994-04-15), US, pages 1294 - 1301, XP055664453, ISSN: 0003-2700, DOI: 10.1021/ac00080a015