1. Sidigia I, Nyaigotti-Chacha C, Kanunah MP: Traditional Medicine in Africa. 1990, East African Educational Publishers, Nairobi
2. Barrow EGC: The dry lands of Africa: Local participation in tree management. 1996, Initiative Publishers, Nairobi
3. Fratkin E: Tradition sal medicine and concepts of healing among Samburu pastoralists of Kenya. Journal of Ethnobiology. 1996, 16 (1): 63-97.
4. Ehret C: Between the coast and the Great lakes. General History of East Africa. Edited by: Niane DT. 1984, Unesco, Paris, IV: 481-497.
5. Ole Sankan SS: The Maasai. 1995, Kenya Literature Bureau, Nairobi