“Effect of Low Dose Lead (Pb) Administration on Tail Immersion Test and Formalin-Induced Pain in Wistar Rats: Possible Modulatory Role of Cobalt (II) Chloride”. Nigerian Journal of Physiological Sciences, ج 31, ش 2, می 2021, صص 161-4, https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/1871.