Lekdumrongsak, T., and W. Banlunara. “Treatment of Cloacal Papilloma With 50% Silver Nitrate Solution in Chestnut-Fronted Macaws (Ara Severus)”. The Thai Journal of Veterinary Medicine, vol. 47, no. 4, Dec. 2017, pp. 531-5, https://he01.tci-thaijo.org/index.php/tjvm/article/view/107380.