The NISN position statement on antiviral resistance was published in the Antiviral Research in 2001:
Zambon, M, and F. G. Hayden (2001). Position statement; global neuraminidase inhibitor susceptibility network (NISN). Antivir. Res. 49:147–156.
The statement of the Network covers background and context to the formation of the group, including why NI resistance surveillance is needed; mechanisms of NI resistance including phenotypic and genotypic characterization; currently recommended approaches and assays, and future directions for neuraminidase inhibitor resistance monitoring in influenza viruses.