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Liu, Yangyang, Yang, Yue, Wang, Qian, Khalifa, Muhammad, Zhang, Zhaoying, Tong, Linjing, Li, Jianlong and Shi, Aiping (2019). Assessing the Dynamics of Grassland Net Primary Productivity in Response to Climate Change at the Global Scale. Chin. Geogr. Sci., 29 (5). S. 725 - 741. NEW YORK: SPRINGER. ISSN 1993-064X
Liu, Yangyang, Zhang, Zhaoying, Tong, Linjing, Khalifa, Muhammad, Wang, Qian, Gang, Chengcheng 
ORCID: 0000-0002-2804-5636, Wang, Zhenqian, Li, Jianlong and Sun, Zhengguo
(2019).
Assessing the effects of climate variation and human activities on grassland degradation and restoration across the globe.
Ecol. Indic., 106.
AMSTERDAM:
ELSEVIER.
ISSN 1872-7034