Studies on the density, heat capacity, surface tension and infinite dilution diffusion with the ionic liquids [C4mim][NTf2], [C4mim][dca], [C2mim][EtOSO3] and [Aliquat][dca] Nieto de Castro, C.A.; Langa, E.; Morais, A.L.; Lopes, M.L.M.; Lourenço, M.J.; Santos, F.J.; Santos, M.S.C.; Lopes, J.N.C.; Veiga, H.I.; Macatrão, M.; Esperança, J.M.; Marques, C.S.; Rebelo, L.P.; Afonso, C.A.; Fluid Phase Equilibria 2010, 294, 157-179