1. The evolution of social behaviour;Alexander;Ann. Rev. Ecol. Syst.,1974
2. Nutrient reserves and reproductive performance of female lesser snow geese;Ankney;Auk,1978
3. Egg formation and the pre-laying period of black-browed and grey-headed albatrosses Diomedea melanophris and D. chrysostoma at Bird Island, South Georgia;Astheimer;Auk,1985
4. Sociobiology of bank swallows: reproductive strategy of the male;Beecher;Science,1979
5. Mate guarding in the magpie Pica pica;Birkhead;Anim. Behav.,1979