Clausager, I.
, Noer, H. & Kørvel, H. (red.) (1999).
Ænder. I H. Kørvel (red.),
Jagthåndbog (s. 274-288). Gyldendal.
Ganter, B., Larsson, K., Syroechkovsky, E. V., Litvin, K. E., Leito, A.
, Madsen, J., Madsen, J. (red.), Cracknell, G. (red.) & Fox, T. (red.) (1999).
Barnacle Goose Branta leucopsis : Russia / Baltic.
Wetlands International Publication,
48, 270-283.
Andersson, Å.
, Madsen, J., Mooij, J., Reitan, O., Madsen, J. (red.), Cracknell, G. (red.) & Fox, T. (red.) (1999).
Canada Goose Branta canadensis : Fennoscandia / Continental Europe.
Wetlands International Publication,
48, 236-245.
Stenseth, N. C., Chan, K.-S., Tong, H., Boonstra, R., Boutin, S., Krebs, C. J., Post, E., O'Donoghue, M., Yoccoz, N. G.
, Forchhammer, M. C. & Hurrell, J. W. (1999).
Common Dynamic Structure of Canada Lynx Populations within Three Climatic Regions.
Kexue (Shanghai),
285(5430), 1071-1073.