Pal Gupta, Anek, S. Nasir Abbas Rizvi, and P.K. Varshney. 2010. “ Ion Exchange Behaviour of Tin (IV) Molybdophosphate Towards Alkaline Earth Metal Ions ”. Asian Journal of Chemistry 5 (4):1001-8. https://asianpubs.org/index.php/ajchem/article/view/24966.