Product cited in:
Lindstrom, Cox, Klimov: "Genetic analysis of human H2N2 and early H3N2 influenza viruses, 1957-1972: evidence for genetic divergence and multiple reassortment events." in: Virology, Vol. 328, Issue 1, pp. 101-19, 2004 (PubMed).
Boon, de Mutsert, Fouchier et al.: "The hypervariable immunodominant NP418-426 epitope from the influenza A virus nucleoprotein is recognized by cytotoxic T lymphocytes with high functional avidity." in: Journal of virology, Vol. 80, Issue 12, pp. 6024-32, 2006 (PubMed).