Ezekwe, Ifeanyichukwu Clinton, Ngozi Nma Odu, y Ayibatonye Gasa. «Pollution from Non-Oil Sources in the River Nun Downstream of Yenegoa Town, South-South Nigeria». Estudos de Biologia 36 (noviembre 28, 2014). Accedido julio 3, 2024. https://periodicos.pucpr.br/estudosdebiologia/article/view/22965.