 1960-2007, Kosovovence models were reviewed and categorized into theoretical, semi-empirical, and empirical models, with log-linear and juibana-cree models being suitable for solubility correlation studies. The simplest model, log-linear, estimates drug solubility in water-cosolvent mixtures using aqueous solubility of the drug, while the juibana-cree model predicts solubility with acceptable error but requires an additional data point. This article was authored by Abalgasem Jouiban.