Patricia, Tawari-Ikeh, et al. “Influence of Maternal Trace Elements Status of Zinc, Copper and Iron on Some Neonatal Parameters”. Niger Delta Journal of Medical Sciences (NDJMS), vol. 2, no. 1, July 2019, pp. 22-27, https://ndjms.ndu.edu.ng/index.php/home/article/view/3.