%0 Journal Article %T Regulation of branch-level gas exchange of boreal trees: roles of shoot water potential and vapor pressure difference %A Qing-Lai Dang, Hank A. Margolis, Marie R. Coyea, Mikailou Sy, G. James Collatz %J Tree Physiology %V 17 %N 8-9 %@ 0829-318X %D 1997-08-01 %I Oxford University Press %~ DeepDyve