N. L. Dykes, A. Kovacs, D. H. Schlafer, C. E. Wilker, V. N. Meyers-Wallen, B. A. Ball, XX sex reversal in a llama.Javma-journal of The American Veterinary Medical Association. ,vol. 204, pp. 112- 115 ,(1994)
Kathy A. Spaulding, Kevin L. Anderson, Mathew P. Gerard, Kyleigh A. Geissler, Keith P. Poulsen, Bilateral renal agenesis in an alpaca cria.Canadian Veterinary Journal-revue Veterinaire Canadienne. ,vol. 47, pp. 159- 161 ,(2006)