E. K.  Balon and Stewart, D. J., ?Fish assemblages in a river with unusual gradient (Luongo, Africa-Zaire system), reflections on river zonation, and description of another new species?, vol. 9, pp. 225 - 252, 1983.

T. R.  Roberts and Stewart, D. J., ?An ecological and systematic survey of fishes in the rapids of the lower Zaire or Congo River?, vol. 147, pp. 239 - 317, 1976.

M.  Poll and Stewart, D. J., ?Un Mochocidae et un Kneriidae nouveaux de la rivière Luongo (Zambia), affluent du bassin du Congo (Pisces)?, vol. 89, pp. 151 - 158, 1975.