Zheng, K., Y. Zhang, L. Liu, and C. Zhao. “Distributed Data Acquisition System for Condition Monitoring of Low-Speed Machines Using Wireless Sensor Networks”. International Journal of Online and Biomedical Engineering (iJOE), vol. 12, no. 01, Jan. 2016, pp. pp. 17-23, doi:10.3991/ijoe.v12i1.5021.