1. T. W. Alderich, and D. G. Ravling .1983 .Effects of experience and body weight on incubation behavior of Canada Geese., Auk,199:670 -679 .
2. Lack's Brood Reduction Hypothesis and Avian Hatching Asynchrony: What's Next?
3. R. Andersen, B.E. Saether, and H. C. Pedersen .1993 .Resource limitation in a long-lived seabird, the Antarctic PetrelThalassoica antarctica: a twinning experiment., Fauna Norwegica Serie C, Cinclus,16:15 -18 .
4. Regulation of parental investment in the Antarctic petrel Thalassoica antarctica: an exchange experiment
5. T. Anker-Nilssen, 1992 .Food supply as a determinant of reproduction and population development in Norwegian PuffinsFratercula arctica..Dissertation. University of Trondheim, Trondheim, Norway.