A. Mlotha, Lusayo, et al. “Effect of Integrated Chicken Manure and Inorganic Fertilizers on Growth and Yield of Hybrid Maize (Zea Mays. L.) in Malawi”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 36, no. 6, Nov. 2017, pp. 262-75, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/8441.