Acevedo, A. M., Villarreal, L. Y. B., Richtzenhain, L. J., Noda, J. and Brandão, P. E. (2012) “Detection of infectious bronchitis virus and Avian metapneumovirus by a duplex semi-nested reverse transcription–polymerase chain reaction assay”, Brazilian Journal of Veterinary Research and Animal Science, 49(3), pp. 221-224. doi: 10.11606/issn.1678-4456.v49i3p221-224.