Details
Fagg, W.: Yoruba Sculpture of West Africa, London, 1982; Thompson, R.F.: Black Gods and Kings, Los Angeles, 1976; Stoll, M. and G.: Ibeji Twin Figures of the Yoruba, Munich, 1980; Drewal, H.J., Pemberton, J. and Abiodun, R.: Yoruba Nine Centuries of African Art and Thought, New York, 1989; Jantzen, H. and Bertsch, L.: Doppel-Leben Ibeji Zwillingsfiguren der Yoruba, Munich, 1993; Vogelzang, J.: "ere ibeji", Berg en Dal, 1994; and eight other volumes of related interest (14)