9Alexander DJ, Russell PH, Parsons G, et al.Antigenic and biological characterisation of avian paramyxovirus type I isolates from pigeons-an international collaborative study[J].Avian Pathol, 1985, 14 (3) : 365-76.
10Dortmans JC, Koch G, Rottier PJ, et al..A comparative infection study of pigeon and avian paramyxovirus type 1 viruses in pigeons : evaluation of clinical signs, virus shedding and seroconversion[J]. Avian Pathol 2011, 40 (2) : 125-30.