Guangsheng Che

The PB1 gene from H9N2 avian influenza virus showed high compatibility and increased mutation rate after reassorting with a human H1N1 influenza virus

M. D. de Jong, Zejun Li, N. Beerens, 2021, Virology journal.

Pathogenicity of reassortant H9 influenza viruses with different NA genes in mice and chickens

Zejun Li, Hongjun Chen, Hongrui Cui, 2016, Veterinary Research.