“Serum and Stool Levels of Zinc, Copper and Vitamin A in Children aged 6-24 Months with Diarrhoea”, Niger J Paediatr, vol. 36, no. 1&2, pp. 29–32, Jul. 2024, Accessed: Oct. 16, 2026. [Online]. Available: https://njpaediatrics.com/index.php/njp/article/view/543