L. Knapp
Invasion of old-growth forests by Ailanthus altissima: sapling growth and recruitment in canopy gaps
Knapp, L. B., and Charles D. Canham. 2000. “Invasion Of Old-Growth Forests By Ailanthus Altissima: Sapling Growth And Recruitment In Canopy Gaps”. J. Torrey Bot. Soc. 127: 307-315. http://www.caryinstitute.org/reprints/Knapp_and_Canham_2000_J_Torr_Bot_Soc_127_307-315.pdf.