The emission spectrum of the [Math] ion : fermi resonance between the 100 and 020 levels of the [Math] ground state of [Math] and [Math] ionsClaudine Larcher, Dolorès Gauyacq and Joëlle RostasJ. Chim. Phys., 77 (1980) 661-665DOI: https://doi.org/10.1051/jcp/1980770661