G. Völgyi, A. Marosi, K. Takács-Novák, and A. Avdeef, “Salt Solubility Products of Diprenorphine Hydrochloride, Codeine and Lidocaine Hydrochlorides and Phosphates – Novel Method of Data Analysis Not Dependent on Explicit Solubility Equations”, ADMET DMPK, vol. 1, no. 4, pp. 48–62, Dec. 2013.