1Trevor M. Hunt. Handbook of wear debris analysis and particle detection in liquids [ M ]. London: ELSEVIER APPLIED SCIENCE, 1993.
2Zhengduo Pang, Nianfeng Shi, Guoying Meng, Wei Li. Development of in - line Contamination Sensor for Lubricant of Scraper Conveyor Reducer. Proceedings of 9th International Conference on Electronic Measurement and Instruments, 2009, 4808 - 4812.