Citation
Robb, G.N., McDonald, R.A., Inger, R., Reynolds, S.J., Newton, J., McGill, R.A.R., Chamberlain, D.E., Harrison, T.J.E. & Bearhop, S. 2011. Using stable-isotope analysis as a technique for determining consumption of supplementary foods by individual birds. Condor 113: 482. doi:10.1525/cond.2011.090111