(en) Marc Leo Felix, « Pyaang », in 100 peoples of Zaire and their sculpture: the handbook, Zaire Basin Art History Research Foundation, 1987, p. 148
(en) Jan Vansina, The children of Woot : a history of the Kuba peoples, University of Wisconsin Press, Madison, 1978, 394 p. (ISBN0-299-07490-0) (nombreuses références)