«Heavy Metals Contamination in Water, Soil and Plant Samples of Okomu National Park, Edo State, Nigeria», AJBR, vol. 23, fasc. 1, pp. 29–34, gen. 2020, Consultato: 10 aprile 2026. [Online]. Disponibile su: https://www.ojshostng.com/index.php/ajbr/article/view/859