Crystalline phase transitions and acoustic phonons behaviour of polymorphic ethanol R. J. Jiménez Riobóo, B. Kabtoul and M. A. Ramos Eur. Phys. J. B, 71 1 (2009) 41-45 Published online: 11 August 2009 DOI: 10.1140/epjb/e2009-00271-7