J. S. Buckeridge, J. W. M. Jagt, and R. P. Speijer, “Verruca punica, a new species of verrucomorph barnacle (Crustacea, Cirripedia, Thoracica) from the Lower Danian (Palaeocene) of Tunisia”, Zootaxa, vol. 1844, no. 1, pp. 37–46, Aug. 2008.