NISA, V.-U.-., R. AHMED, and M. MUHAMMAD. “?DETERMINATION OF HEAVY AND TOXIC METALS Zn, Cd, Pb AND Cu IN VEGETABLES BY VOLTAMETRY”. Biological Sciences - PJSIR, vol. 37, no. 1-2, Jan. 1994, pp. 33-36, https://v2.pjsir.org/index.php/biological-sciences/article/view/2565.