„Heavy Metals Contamination in Water, Soil and Plant Samples of Okomu National Park, Edo State, Nigeria", AJBR, roč. 23, č. 1, s. 29–34, led. 2020, Viděno: 15. červen 2026. [Online]. Dostupné z: https://ojshostng.com/index.php/ajbr/article/view/859