van Gils, J. A., Munster, V. J., Radersma, R., Liefhebber, D., Fouchier, R. A., & Klaassen, M. (2007). Hampered Foraging and Migratory Performance in Swans Infected with Low-Pathogenic Avian Influenza A Virus. Public Library of Science.

van Gils, Jan A., Vincent J. Munster, Reinder Radersma, Daan Liefhebber, Ron A.M Fouchier, e Marcel Klaassen. Hampered Foraging and Migratory Performance in Swans Infected With Low-Pathogenic Avian Influenza A Virus. Public Library of Science, 2007.

van Gils, Jan A., et al. Hampered Foraging and Migratory Performance in Swans Infected With Low-Pathogenic Avian Influenza A Virus. Public Library of Science, 2007.