Goodrich, B. A., K. M.  Waring, and T. E.  Kolb. 2016. Genetic variation in Pinus strobiformis growth and drought tolerance from southwestern US populations.. Tree physiology 36:1219 - 1235.

Bridgeland, W. T., P.  Beier, T.  Kolb, and T. G.  Whitham. 2010. A conditional trophic cascade: birds benefit faster growing trees with strong links between predators and plants.. Ecology 91:73 - 84.