J. Range Manage. B.H. Allen-Diaz, and W.J. Tietje. 1994. The effect of Quercus douglasii removal on understory yield and composition. J. Range Manage. Bayless, L. 1988.
Researchers study how trees affect forage production on rangelands.
CATI Publication 880501. Borchert, M., F. W. Davis and B. H. Allen-Diaz. Campbell, Christopher G. and Barbara Allen-Diaz. An examination of oak woodland springs in the Sierra Foothills of California. USDA Forest Service Res.