Molecular reorientation in pyrene hexafluoroarsenate salts B. Pongs, T. Wokrina, S. Matejcek, C. Buschhaus and E. Dormann Eur. Phys. J. B, 28 3 (2002) 289-297 Published online: 31 July 2002 DOI: 10.1140/epjb/e2002-00232-8