1. The Mathematical Heritage of the Tiv People;Adaaku,1982
2. African Observers of the Universe: The Sirius Question;Adams,1983
3. New Light on the Dogon and Sirius;Adams,1983
4. Indigenous Mathematics: A Case Study of the Aweri Community of Ogun State;Akin,1985
5. Números simbólicos y rituales en el Africa subsahariana;Alberich,1990