1. Alerstam T, Enckell PH (1979) Unpredictable habitats and evolution of bird migration. Oikos 33:228–232
2. Alerstam T, Hedenström A, Åkesson S (2003) Long-distance migration: evolution and determinants. Oikos 103:247–260
3. Alisauskas RT, Ankney CD (1992) The cost of egg-laying and its relationship to nutrient reserves in waterfowl. In: Batt BDJ, Afton AD, Anderson MG, Ankney CD, Johnson DH, Kadlec JA, Krapu GL (eds) Ecology and management of breeding waterfowl. University of Minnesota Press, Minneapolis, pp 30–61
4. Anderberg A-L (1994) Atlas of seeds and small fruits of Northwest-European plant species (Sweden, Norway, Denmark, East Fennoscandia, Iceland). Part 4, Resedaceae-Umbelliferae. Swedish Museum of Natural History, Stockholm
5. Anderson MG, Rhymer JM, Rohwer FC (1992) Philopatry, dispersal and the genetic structure of waterfowl populations. In Breeding ecology and management of waterfowl. In: Batt BDJ, Afton AD, Anderson MG, Ankney CD, Johnson DH, Kadlec JA, Krapu GL (eds) Ecology and management of breeding waterfowl. University of Minnesota Press, Minneapolis, pp 365–395