1. 1) K. K. Murray, R. K. Boyd, M. N. Eberlin, G. J. Langley, L. Li, and Y. Naito, “Standard Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2006),” Draft, 31 Aug 2006; URL: <http://www.iupac.org/reports/provisional/abstract06/murray_prs.pdf>.
2. 2) O. D. Sparkman, “Mass Spectrometry Desk Reference, 2nd Edition,” Global View Publishing, Pittsburgh (2006), p. 60.