M. Twery
Canham, Charles D., M.J. Papaik, Maria Uriarte, W. McWilliams, J. C. Jenkins, and M. Twery. 2006. “Neighborhood Analyses of Canopy Tree Competition Along Environmental Gradients in New England Forests”. Ecol. Appl. 16: 540-54. http://www.caryinstitute.org/reprints/Canham_et_al_2006_Ecol_Appl.pdf.