B. M.  Bönner, Lutz, W., Jäger, S., Redmann, T., Reinhardt, B., Reichel, U., Krajewski, V., Weiss, R., Wissing, J., Knickmeier, W., Gerlich, W. H., Wend, U. C., and Kaleta, E. F., ?Do Canada geese (Branta canadensis Linnaeus, 1758) carry infectious agents for birds and man??, European Journal of Wildlife Research, vol. 50, pp. 78?84, 2004.