Zhao Jianping, Zhou Zhigang, Hu Hongling, Guo Zhi, Wang Tao, Zhen Guohua, Zhang Zhenxiang. The relationships among reactive oxygen species, hypoxia--inducible factor 1#alpha# and cell proliferation in rat pulmonary arterial smooth muscle cells under hypoxia. Acta Physiol Sin 2007; 59 (3): 319-324 (in Chinese with English abstract).