Oryx Olsen, M T B, Geldmann, J, Harfoot, M, Tittensor, D P, Price, B, Sinovas, P, Nowak, K, Sanders, N J & Burgess, N D 2019, ' Thirty-six years of legal and illegal wildlife trade entering the USA ', Oryx, vol. 55, no. 3, pp. 432-441 . https://doi.org/10.1017/S0030605319000541
Tittensor, D P, Harfoot, M, McLardy, C, Britten, G L, Kecse-Nagy, K, Landry, B, Outhwaite, W, Price, B, Sinovas, P, Blanc, J, Burgess, N D & Malsch, K 2020, ' Evaluating the relationships between the legal and illegal international wildlife trades ', Conservation Letters . https://doi.org/10.1111/conl.12724 Conservation Letters, Vol 13, Iss 5, Pp n/a-n/a (2020)