Achudume, Albert C., and Jacob T. Olawale. “Seasonal Variations in Heavy Metals Concentrations in <i>Chromolaena Odorata < I> (L.) King & Robinson Foliage and Soil at a Solid Waste Dump Site in Osun State, Nigeria”. Journal of Tropical Agriculture, vol. 47, no. 1, Dec. 2009, pp. 58-61, https://jtropag.kau.in/index.php/ojs2/article/view/205.