Adigun, M. O., and O. Babalola. “Effects of Pig Dung and Poultry Manure With Plant Residues on the Production of Some Fruit Vegetables”. International Multidisciplinary Research Journal, vol. 3, no. 2, Mar. 2014, pp. 32-35, https://updatepublishing.com/journal/index.php/imrj/article/view/1671.