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J. J.  DAY, BILLS, R., and FRIEL, J. P., ?Lacustrine radiations in African Synodontis catfish?, Journal of Evolutionary Biology, vol. 22, pp. 805 - 817, 2009.

J. P.  FRIEL and Sullivan, J. P., ?Synodontis woleuensis (Siluriformes: Mochokidae), a new species of catfish fromGabon and Equatorial Guinea, Africa?, PROCEEDINGS OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA, vol. 157, pp. 3 - 12, 2008.

J. P.  FRIEL and Vigliotta, T. R., ?Atopodontus adriaensi, a new genus and species of African suckermouth catfish from the Ogooué and Nyanga River systems of Gabon (Siluriformes: Mochokidae)?, vol. 157, pp. 13 - 23, 2008.