1 Ma Zhiyuan, Wang Xingang, et al. Hydrogen and oxygen isotope exchange of underground hot water in central Guanzhong basin of Shaanxi province and its influencing factors. Geological bulletin. June 2008, Volume 27, No.6: 888-894

2 Application of Ma Zhiyuan Environmental Isotope Method in the Study of Karst Groundwater in Northwest China, Geological Review, 2004. (3)78-83:

3 Ma Zhiyuan, Niu, Liu Fang, Hou, Dang Xueya, Environmental Isotope Study on Circulation Model and Renewability of Buried Karst Water, Geological Bulletin, 2006 (6); 756-76 1

4 Su Yan, Ma Zhiyuan, Xi Xianyang groundwater deuterium excess study "Coalfield Geology and Exploration" 2007 (3)39-42.

Fan Niu, Ma Zhiyuan. Classification of geothermal water in Guanzhong area. Coalfield Geology and Exploration, 2005(5)57-57.

6 Ma Zhiyuan, Gao, Guo Jianqing, using environmental tritium to calculate the retention time and water storage coefficient of buried karst aquifer; Coal Geology and Exploration 1997 (3)34-4 1 EI Search.

7 Ma Zhiyuan, Fan, Formation of Sulfate in Karst Groundwater in the East of Weibei, Shaanxi, Coalfield Geology and Exploration, 2005. (3) 45-52;

8 Calculation of aquifer parameters and groundwater retention time by finite-state mixed model of tritium tracer in Ma Zhiyuan, Journal of Safety and Technology, 1999( 1)(CA search);

9 Ma Zhiyuan. Application prospect of environmental tritium technology in karst water research in northwest China. International Symposium on Hydrogeology and Environment, 2000. 10 .(ISTP search);

10 environmental isotope evolution of geothermal storage fluid in Ma Zhiyuan and its indicative significance.

11recharge temperature and thermal storage temperature of Xi' an sag Journal of Geological Environment of Dewll Hu, Ma Zhiyuan, June 2009, Volume 31:173-179.

12 isotope distribution characteristics of underground hot water environment in Guanzhong basin Ma Zhiyuan and its hydrogeological significance Journal of Earth Science Environment 2008.6 Volume 3 1: 73-79.