Zagorec-Marks, W., Foreman, M. M., Verlet, J. R., & Weber, J. M. (2019). Cryogenic Ion Spectroscopy of the Green Fluorescent Protein Chromophore in Vacuo. Journal of Physical Chemistry Letters, 10(24), 7817-7822. https://doi.org/10.1021/acs.jpclett.9b02916