EBONG, G. A.; UDOESSIEN, E. I.; ITA, B. N. Seasonal variations of heavy metal concentrations in Qua Iboe River Estuary, Nigeria. Global Journal of Pure and Applied Sciences, [S. l.], v. 10, n. 4, p. 611–617, 2004. DOI: 10.4314/gjpas.v10i4.16446. Disponível em: https://www.ajol.info/index.php/gjpas/article/view/16446. Acesso em: 9 nov. 2026.