Ekere, N., Oparanozie, T., Ihedioha, J., & Agbazue, V. (2015). Distribution and Health Risks of Nitrate and Heavy Metals in Edible Leafy Vegetables Grown in Sewage Sludge and Wastewater-Amended Agricultural Soils. Asian Journal of Chemistry, 28(1), 6–10. https://doi.org/10.14233/ajchem.2016.19117