(en) F. R. Fontaine, G. Roult, B. Hejrani, L. Michon, V. Ferrazzini et al., « Very- and ultra-long-period seismic signals prior to and during caldera formation on La Réunion Island », Scientific Reports, vol. 9, , article no 8068 (DOI10.1038/s41598-019-44439-1).