https://api.elsevier.com/content/article/pii/S1386142521001694doi:10.1016/j.saa.2021.1195931-s2.0-S138614252100169410.1016/j.saa.2021.119593S1386-1425(21)00169-4Vibrational spectra of La@ C 60 and Ce@ C 60 endohedral fullerenes: Influence of spin state multiplicity Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyJournal138614252021-06-055 June 20210falsefalse