Protozoan community character in relation to trophic level in the Beijing section of the Juma River
Fengchao Li, Xianjiang Kang, Wenbo Yang, Yueqiang Guan, Xiaohui Zhang, Weiwei Liu, Gongming Shen, Jilong Li, Hongwei Wang
Biodiv Sci . 2006, (4): 327 -332 .  DOI: 10.1360/biodiv.060004