R. K. Biswas and A. K. Karmakar, “Statistical Experimental Design for the Extraction of Ti(IV) in the Ti(IV)-SO₄^2- (H⁺, Na⁺) – Cyanex 301 – Kerosene – 5% (v/v) Heptane-1-ol System”, J. Sci. Res., vol. 10, no. 3, pp. 275–289, Sep. 2018.