Zhang, X., Zhao, Y., Zhao, W., Xu, W.- wei, & Ji, W.- chao. (2016). A Wireless Sensor Networks-based Intelligent System for Library Air Quality Monitoring. International Journal of Online and Biomedical Engineering (iJOE), 12(11), pp. 76–79. https://doi.org/10.3991/ijoe.v12i11.6227