«Heavy Metals Contamination in Water, Soil and Plant Samples of Okomu National Park, Edo State, Nigeria», AJBR, bd. 23, nr. 1, s. 29–34, jan. 2020, åpnet: 26. juni 2026. [Online]. Tilgjengelig på: https://ojshostng.com/index.php/ajbr/article/view/859