Compressibility and pressure correlations in isotropic solids and fluids J. P. Wittmer, H. Xu, P. Polińska, C. Gillig, J. Helfferich, F. Weysser and J. Baschnagel Eur. Phys. J. E, 36 11 (2013) 131 Published online: 22 November 2013 DOI: 10.1140/epje/i2013-13131-y