1. 1) ‹http://www.iupac.org/projects/2003/2003-056-2-500.html›
2. 3) ‹http://www.msterms.com/docs/IUPAC_MS_Terms_Second_Draft.pdf›
3. 4) O. D. Sparkman, “Mass Spectrometry Desk Reference, 2nd Edition,” Global View Publishing, Pittsburgh (2006), p. 28.