High-Precision Sub-Doppler Infrared Spectroscopy of HeH + Adam J. Perry, James N. Hodges, Charles Markus, G. Stephen Kocheril, Paul A. Jenkins II, and.
S.S. Doeleman, R.B. Phillips, A.E.E. Rogers, J.M. Attridge, M.A. Titus, D.L. Smythe, R.J. Cappallo, T.A. Buretta, A.R. Whitney (MIT Haystack Observatory),
High-Precision Sub-Doppler Infrared Spectroscopy of HeH +
Cavity Enhanced Velocity Modulation Spectroscopy