A short list for the Canadian field/gamma studies of small mammals that were the basis of my talk are:

MIHOK, S. ( 2004 ) Chronic exposure to gamma radiation of wild populations of meadow voles ( Microtus pennsylvanicus ). Journal of Environmental Radioactivity 75:233-266 .

BOONSTRA, R., MANZON, R.G., MIHOK, S. & HELSON, J.E. (2005) Hormetic effects of gamma radiation on the stress axis of natural populations of meadow voles ( Microtus pennsylvanicus ). Environmental Toxicology and Chemistry 24: 334-343.

MIHOK, S. , SCHWARTZ, B. & S.L. IVERSON (1985) Ecology of red-backed voles ( Clethrionomys gapperi ) in a gradient of gamma radiation. In: STENSETH, N.C. [editor]. Clethrionomys biology: Population dynamics, dispersal, reproduction and social structure. Annales Zoologica Fennici 22:257-271.