References
Grant, P.R. and Grant, B.R. (2000) 'Quantitative genetic variation in populations of Darwin's finches', in Mousseau, T.A., Sinervo, B. and Endler, J. (eds), Adaptive Variation in the Wild, New York, Academic Press, pp. 3-40.
Grant, P.R., Grant, B.R., Keller, L.F., Markert, J.A. and Peren, K. (2003) 'Inbreeding and interbreeding in Darwin's finches', Evolution, vol. 57, no. 12, pp. 2911-16.