Authors:
Zhou, LM
Tucker, CJ
Kaufmann, RK
Slayback, D
Shabanov, NV
Myneni, RB
Citation: Lm. Zhou et al., Variations in northern vegetation activity inferred from satellite data ofvegetation index during 1981 to 1999, J GEO RES-A, 106(D17), 2001, pp. 20069-20083