1. Bullock, J. M., Kenward, R. E. & Hails, R. S. (eds) Dispersal Ecology (Blackwell, Malden, Massachusetts, 2002)
2. Murray, J. D. Mathematical Biology (Springer-Verlag, New York, 1993)
3. Clobert, J., Danchin, E., Dhondt, A. A. & Nichols, J. D. (eds) Dispersal (Oxford Univ. Press, Oxford, 2001)
4. Nicholson, K. & Webster, R. G. Textbook of Influenza (Blackwell, Malden, Massachusetts, 1998)
5. Grenfell, B. T., Bjornstadt, O. N. & Kappey, J. Travelling waves and spatial hierarchies in measles epidemics. Nature 414, 716–723 (2001)