R. Okunade, A. Akinlabi, F. Abiodun, O. M. Agbebi, ve B. Oladosu, “Effect of Poultry Manure Rate and NPK 15:15:15 on the Perfomance and Nutritional Content of Sweet Potato (Ipomoea batatas l.)”, TURSTEP, ss. 332–337, Eki. 2023.