, 2007, Vitalogical aesthetics: The idea of beauty in African culture, art and philosophy, in A. Tymieniecka (ed.), Phenomenology of life from the animal soul to the human mind, Dordrecht, Springer, pp. 431-442.
, 2006, "Vitalogy": The African vision of the human person, in A. Tymieniecka (ed.), Logos of phenomenology and phenomenology of the logos II, Dordrecht, Springer, pp. 101-120.
, 2004a, "African vitalogy": The African mind and spirituality, in A. Tymieniecka (ed.), Imaginatio creatrix, Dordrecht, Kluwer, pp. 265-287.
, 2004b, The world as an eternal entity and vitalogical living reality, in A. Tymieniecka (ed.), Does the world exist?, Dordrecht, Kluwer, pp. 683-704.
, 1999, The notion of "Eleng", that is of time, in African original experience: The vitalogical dimension, in A. Tymieniecka (ed.), Life scientific philosophy, phenomenology of life and the sciences of life, Dordrecht, Kluwer, pp. 115-129.
, 1997a, Vitalogie comme expression de la pensée Africaine, in A. Tymieniecka (ed.), Phenomenology of life as the starting point of philosophy, Dordrecht, Kluwer, pp. 281-298.