Viscosity and Thermal Conductivity of 1-Hexyl-3-methylimidazolium Tetrafluoroborate and 1-Octyl-3-methylimidazolium Tetrafluoroborate at Pressures up to 20 MPa Tomida, D.; Kenmochi, S.; Tsukada, T.; Qiao, K.; Bao, Q.; Yokoyama, C.; International Journal of Thermophysics 2012, 33, 959-969