Herrera, I., Khan, S. R., Kaleta, E. F., Müller, H., Dolz, G., & Neumann, U. (2002). Serological Status for Chlamydophila psittaci, Newcastle Disease Virus, Avian Polyoma Virus, and Pacheco Disease Virus in Scarlet Macaws (Ara macao) Kept in Captivity in Costa Rica.

Herrera, I., S. R. Khan, E. F. Kaleta, H. Müller, Gaby Dolz, ja U. Neumann. Serological Status for Chlamydophila Psittaci, Newcastle Disease Virus, Avian Polyoma Virus, and Pacheco Disease Virus in Scarlet Macaws (Ara Macao) Kept in Captivity in Costa Rica. 2002.

Herrera, I., et al. Serological Status for Chlamydophila Psittaci, Newcastle Disease Virus, Avian Polyoma Virus, and Pacheco Disease Virus in Scarlet Macaws (Ara Macao) Kept in Captivity in Costa Rica. 2002.