Pressure-temperature phase diagrams of several (TMTTF)2X compounds : stabilisation of a highly conducting metallic state under pressure in (TMTTF)2Br S.S.P. Parkin, F. Creuzet, D. Jérome, J.M. Fabre et K. BechgaardJ. Phys. France, 44 8 (1983) 975-984DOI: https://doi.org/10.1051/jphys:01983004408097500