Detection of infrared fluorescence of carbon dioxide in R Leonis with SOFIA/EXES J. P. Fonfría, E. J. Montiel, J. Cernicharo, C. N. DeWitt and M. J. Richter A&A, 643 (2020) L15 Published online: 23 November 2020 DOI: 10.1051/0004-6361/202039547