4Alexander D J,Brown I H. Recent zoonoses caused by influenza A viruses. Rev Sci Tech Off Int Epiz,2000, 19:197-225. 被引量:1
5Brown I H, Done S H,Speneer Y I. Pathogencity of a swine in- fluenza H1N1 virus antigenically distinguishable from classical and European strains. Vet Rec,1993, 132:598-602. 被引量:1