1. Apter A (1987) The historiography of Yoruba myth and ritual. Hist Afr 14:1–25
2. Arago F (1854) Astronomie populaire – Œuvre posthume. Tome Premier. Gide et Baudry, Paris
3. Awolalu OJ (1979) Yoruba beliefs and sacrificial rites. Longman, London
4. Horton R (1979) Ancient Ifè: a reassessment. J Hist Soc Niger 9(4):69–149
5. Lawal B (2008) Ejiwapo: the dialectics of twoness in Yoruba art and culture. Afr Arts 41(1):24–39