Pressure dependence of the Shubnikov-de Haas oscillation spectrum of β"-(BEDT-TTF)4(NH4)[ Cr(C2 O4)3] .DMF D. Vignolles, V. N. Laukhin, A. Audouard, M. Nardone, T. G. Prokhorova, E. B. Yagubskii and E. Canadell Eur. Phys. J. B, 51 1 (2006) 53-60 Published online: 31 May 2006 DOI: 10.1140/epjb/e2006-00199-4