1. Alberts, J. R., and Brunjes, P. C. Ontogeny of thermal and olfactory determinants of huddling in the rat. Journal of Comparative and Physiological Psychology, 1978, 92, 897–906.
2. Alberts, J. R., and Gubernick, D. J. Reciprocity and resource exchange: A symbiotic model of parent-offspring relations. In H. Moltz and L. Rosenblum (Eds.), Symbiosis in parent-young interactions. New York: Plenum, 1983.
3. Alexander, G. Maternal behaviour in the Merino ewe. Proceedings of the Australian Society of Animal Production, 1960, 3, 105–114.
4. Amoroso, E. C., Heap, R. B., and Renfree, M. B. Hormones and the evolution of viviparity. In E. J. W. Barrington (Ed.), Hormones and Evolution, Vol. 2. New York: Academic Press, 1979.
5. Anderson, C. O., Zarrow, M. X., Fuller, G. B., and Denenberg, V. H. Pituitary involvement in maternal nest-building in the rabbit. Hormones and Behavior, 1971, 2, 183–189.