Densities, Refractive Indices, and Viscosities of the Ionic Liquids 1-Methyl-3-octylimidazolium Tetrafluoroborate and 1-Methyl-3-butylimidazolium Perchlorate and Their Binary Mixtures with Ethanol at Several Temperatures Mokhtarani, B.; Mojtahedi, M.M.; Mortaheb, H.R.; Mafi, M.; Yazdani, F.; Sadeghian, F.; Journal of Chemical & Engineering Data 2008, 53, 677-682