Malanson GP, Butler DR, Fagre DB, Walsh SJ, Tomback DF, Daniels LD, Resler LM, Smith WK, Weiss DJ, Peterson DL, Bunn AG, Hiemstra CA, Liptzin D, Bourgeron PS,Shen ZH, Millar CI. 2007.Alpine treeline of western North America: Linking organism-to-landscape dynamics. Physical Geography, 28: 378-396