K. G. Varshney, S. M. Maheshwari, and U. Gupta, “Forward and Reverse Ion Exchange Equilibria on Antimony(V) Phosphate-I: Evaluation of Various Thermodynamic Parameters for the Exchange of Alkali and Alkaline Earth Metal Ions on its Surface”, ajc, vol. 2, no. 1, pp. 57–66, Mar. 2010.