J.  Gosse, ?Mutanda ichthyologica: Synodontis polli nom. nov. et Synodontis ornatissimus nom. nov?, vol. 6, p. 48, 1982.

T. R.  Roberts, ?Unculi (horny projections arising from single cells), an adaptive feature of the epidermis of ostariophysan fishes?, vol. 11, pp. 55 - 76, 1982.