8Le Mao sheng Hua Zong zheng.Summary of China-made Xray thickness gauges for Steel Industries[J].Nuclear Science and Techniques,1993.
9Du Fangxun,Dong Xinfa,Wang Yue.Development ofThickness Measuring Instrument Based on Reflecting Infrared[J].Journal of University of Science and Technology of Suzhou(Engineering and Technology),2006.