Observation of splitting and optical satellites on the Hδ line of hydrogen due to non-resonant interaction with a CO2 laser radiation P. Pignolet, B. Dubreuil, P. Davy et J. MinardJ. Physique Lett., 42 10 (1981) 205-209DOI: https://doi.org/10.1051/jphyslet:019810042010020500