Cluster analysis on summer precipitation field over Qinghai–Tibet Plateau from 1961 to 2004
LU Heli, SHAO Quanqin, LIU Jiyuan, WANG Junbang, CHEN Shenbin, CHEN Zhuoqi
Journal of Geographical Sciences . 2008, (3): 295 -307 .  DOI: 10.1007/s11442-008-0295-y