Zheng, K., Zhang, Y., Chen, B., Dong, Y., Wang, Y., & Li, T. (2015). Design of a WSN System for Condition Monitoring of the Mechanical Equipment with Energy Harvesting. International Journal of Online and Biomedical Engineering (iJOE), 11(2), pp. 43–48. https://doi.org/10.3991/ijoe.v11i2.4366