Electrical Conductivity and Viscosity of Aqueous Binary Mixtures of 1-Alkyl-3-methyl Imidazolium Tetrafluoroborate at Four Temperatures Rilo, E.; Vila, J.; Pico, J.; García-Garabal, S.; Segade, L.; Varela, L.M.; Cabeza, O.; Journal of Chemical & Engineering Data 2010, 55, 639-644