1. Chapman, H.H. 1932. Is longleaf type a climax?Ecology 13:328?334.
2. de la Pe�a, A.C. 1985. Terpenoids fromConradina canescens (Labiatae) with possible allelopathic activity. MS thesis. Louisiana State University, Baton Rouge.
3. Fischer, N.H. 1986. The function of mono- and sesquiterpenes as plant germination and growth regulators, pp. 203?218,in A.R. Putnam and C. Tang (eds.). The Science of Allelopathy. Wiley, New York.
4. ACS Symposium Series;N.H. Fischer,1988
5. Garren, K.H. 1943. Effects of fire on vegetation of the southeastern United States.Bot. Rev. 9:617?654.