Adiabatic and isothermal sound waves: The case of supercritical nitrogenF. Bencivenga, A. Cunsolo, M. Krisch, G. Monaco, G. Ruocco and F. SetteEurophys. Lett., 75 1 (2006) 70-76DOI: https://doi.org/10.1209/epl/i2006-10091-y