J. C.  Biesmeijer, Roberts, S. P. M., Reemer, M., Ohlemu¨ller, R., Edwards, M., Peeters, T., Schaffers, A. P., Potts, S. G., Kleukers, R., Thomas, C. D., Settele, J., and Kunin, W. E., ?Parallel Declines in Pollinators and Insect-Pollinated Plants in Britain and the Netherlands?, Science, vol. 313, pp. 351-354, 2006.