Active membranes studied by X-ray scattering A. Giahi, M. El Alaoui Faris, P. Bassereau and T. Salditt Eur. Phys. J. E, 23 4 (2007) 431-437 Published online: 22 August 2007 DOI: 10.1140/epje/i2007-10203-7