Hoffmann, E., Stech, J., Leneva, I., Krauss, S., Scholtissek, C., Chin, P. S., . . . Webster, R. G. (2000). Characterization of the Influenza A Virus Gene Pool in Avian Species in Southern China: Was H6N1 a Derivative or a Precursor of H5N1? J Virol.

Hoffmann, Erich, Juergen Stech, Irina Leneva, Scott Krauss, Christoph Scholtissek, Po San Chin, Malik Peiris, Kennedy F. Shortridge, and Robert G. Webster. "Characterization of the Influenza A Virus Gene Pool in Avian Species in Southern China: Was H6N1 a Derivative or a Precursor of H5N1?" J Virol 2000.

Hoffmann, Erich, et al. "Characterization of the Influenza A Virus Gene Pool in Avian Species in Southern China: Was H6N1 a Derivative or a Precursor of H5N1?" J Virol 2000.