“FLAME-ATOMIC ABSORPTION SPECTRO­ PHO TOMETRIC DETERMIN A TION OF TRACE METALS IN URINE: Short Communication”. Biological Sciences - PJSIR, vol. 45, no. 1, Feb. 2002, pp. 23-25, https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1734.