Citation
Petit, S., Chamberlain, D.E., Haysom, K., Pywell, R., Vickery, J., Warman, E., Allen D. & Firbank, L.G. 2003. Knowledge-based models for predicting species occurrence in arable conditions. Ecography 26: 640. doi:10.1034/j.1600-0587.2003.03545.x