Cornish, S., Liu, Y., Lane, I., Baird, P., Barwood, G., Taylor, P., & Rowley, W. (2000). Interferometric measurements of I-127(2) reference frequencies for 1S-2S spectroscopy in muonium, hydrogen, and deuterium. Journal of the Optical Society of America B, 17(1), 6-10. https://doi.org/10.1364/josab.17.000006