Cavanagh, D. (2001). ”A nomenclature for avian coronavirus isolates and the question of species status.”. Avian Pathology 30 (2): sid. 109–115. doi:10.1080/03079450120044506. PMID 19184884.
Cavanagh, D (2007). ”Coronavirus avian infectious bronchitis virus”. Veterinary Research 38 (2): sid. 281–97. doi:10.1051/vetres:2006055. PMID 17296157.
Cavanagh, D. (2001). ”A nomenclature for avian coronavirus isolates and the question of species status.”. Avian Pathology 30 (2): sid. 109–115. doi:10.1080/03079450120044506. PMID 19184884.
Cavanagh, D (2007). ”Coronavirus avian infectious bronchitis virus”. Veterinary Research 38 (2): sid. 281–97. doi:10.1051/vetres:2006055. PMID 17296157.