Publications
Long-term trends in ecological systems: a basis for understanding responses to global change. , 1931, p.39 pp.
, 2013. 
A comparison of the species-time relationship across ecosystems and taxonomic groups. Oikos, 112, pp.185-195. Available at: http://onlinelibrary.wiley.com/doi/10.1111/j.0030-1299.2006.14223.x/full.
, 2006.