Martins Candido, Antonio Leandro, Sandro Cesar Silveira Jucá, Renata Imaculada Soares Pereira, Paulo Marvin de Brito Lima, and Solonildo Almeida da Silva. “Low Cost Device for Online Monitoring of Noise in Libraries Using Internet of Things”. International Journal for Innovation Education and Research 6, no. 8 (August 31, 2018): 133–144. Accessed March 7, 2021.