1. Zhang Zhong, Zhang Baogui, Thallium in low temperature ore deposits, China, Chinese Journal of Geochemistry, 1996, 15(1): 87.
2. Zhang Zhong, Long Jiangping, Zhang Baogui, The existing forms, metallogenic model and ore-searching indicators of Tl in As-, Hg-, Sb- and Au-deposits, Geological Review (in Chinese), 1995, 41(4): 363.
3. Zhang Zhong, Zhang Xingmao, Zhang Baogui, Element geochemistry and metallogenic model of the Nanhua As-Tl deposit, Geochimica (in Chinese), 1998, 27(3): 269.
4. Zhang Zhong, Zhang Baogui, Long Jiangping et al., Thallium pollution associated with mining of thallium deposits: Sci- ence in China, Series D, 1998, 41(1): 75.
5. Zhang Zhong, Zhang Baogui, Long Jiangping et al., Study on thallium environmental pollution in the process of mining of thallium deposits in China, Science in China, Series D, 1997, 27(4): 331.