Whigham, Dennis F. and O'Neill, John P. 1988. "
Importance of predation and small scale disturbance to two woodland herb species." In
Plant Form and Vegetation Structure: Adaptation, Plasticity and Relation to Herbivory. Werger, M. J. A., van der Aart, P. J. M., During, H. J., and Verhoeven, Jos T. A., editors. 243–252. The Hague, The Netherlands: SPB Academic Publishers.