Homogeneous superconducting state at 8.1 K under ambient pressure in the organic conductor β-(BEDT-TTF)2I3 F. Creuzet, G. Creuzet, D. Jérome, D. Schweitzer et H.J. Keller J. Physique Lett., 46 22 (1985) 1079-1085 DOI: 10.1051/jphyslet:0198500460220107900