1. Investigations at Old Oyo, 1956–57: an interim report;Willett;Journal of the Historical Society of Nigeria,1961
2. Yoruba pottery-making techniques;Wahlman;Baessler-Archiv,1972
3. The palace at Oyo Ile, Western Nigeria;Soper;West African Journal of Archaeology,1993
4. Excavations at Iwo Eleru;Shaw;West African Journal of Archaeology,1984