Correlation between the Content of Polyphenols in Eucommia Ulmoides Leaves and the Main Ecological Factors  
PENG Mi-jun1*, PENG Sheng2, WANG Xiang1,2, ZHANG Lin-jie2
NATURAL PRODUCT RESEARCH AND DEVELOPMENT . 2018, (5): 823 -831 .  DOI: 10.16333/j.1001-6880.2018.5.016