Islam, M. S., M. T. I. Tarafder, and M. R. R. Khan. “SOME MIXED LIGAND COMPLEXES OF ZIRCONIUM (IV), THORIUM (IV) AND -URANIUM (VI)?? ? ?????????? ? ?? ? Short communication? ?”. Biological Sciences - PJSIR, vol. 42, no. 3, June 1999, pp. 130-2, http://v2.pjsir.org/index.php/biological-sciences/article/view/2133.