Instrumental modifications for compressive testing under hydrostatic confining conditions P. Veyssière, J. Rabier, M. Jaulin, J.L. Demenet et J. CastaingRev. Phys. Appl. (Paris), 20 11 (1985) 805-811DOI: https://doi.org/10.1051/rphysap:019850020011080500