Volumetric, acoustic and spectroscopic studies (FT-IR) of trisodium (TSC) and tripotassium citrate (TPC) in aqueous solution of ionic liquid 1-butyl-3-methylimidazolium tetrafluoro borate [C 4 mim][BF 4 ] at different temperatures Kumar, H.; Katal, A.; The Journal of Chemical Thermodynamics 2018, 116, 85-96