Speed of Sound and Adiabatic Compressibility of 1-Ethyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide under Pressures up to 100 MPa Dzida, M.; Chorążewski, M.; Geppert-Rybczyńska, M.; Zorębski, E.; Zorębski, M.; Żarska, M.; Czech, B.; Journal of Chemical & Engineering Data 2013, 58, 1571-1576