Griffiths, W., Rai, D., Griffiths, W., Landin, B., Wild, B., Alvelius, G., & Green, B. (2003). Accurate Mass Measurement by Electrospray Ionization Quadrupole Mass Spectrometry:   Detection of Variants Differing by <6 Da from Normal in Human Hemoglobin Heterozygotes. Analytical Chemistry, 75(9), pp. 1978-1982. doi:10.1021/ac026228h

Griffiths, William, D.K Rai, W.J Griffiths, B. Landin, B.J Wild, G. Alvelius, and B.N Green. "Accurate Mass Measurement By Electrospray Ionization Quadrupole Mass Spectrometry:   Detection of Variants Differing By <6 Da From Normal in Human Hemoglobin Heterozygotes." Analytical Chemistry 75, no. 9 (2003): 1978-1982.

Griffiths, William, et al. "Accurate Mass Measurement By Electrospray Ionization Quadrupole Mass Spectrometry:   Detection of Variants Differing By <6 Da From Normal in Human Hemoglobin Heterozygotes." Analytical Chemistry 75.9 (2003): 1978-1982.