Ramakrishna R Nemani, Charles D Keeling, Hirofumi Hashimoto, William M Jolly, Stephen C Piper, Compton J Tucker, Ranga B Myneni, Steven W Running,
Climate-driven increases in global terrestrial net primary production from 1982 to 1999. Science. ,vol. 300, pp. 1560- 1563 ,(2003) ,
10.1126/SCIENCE.1082750