Alave, E. N. L., H. A. G. Lim, J. L. Ronquillo, and M. M. Tugade. “PORTABLE ARDUINO-BASED INTEGRATED WATER QUALITY ANALYZER WITH REAL-TIME DATA TRANSMITTER”. MATTER: International Journal of Science and Technology, vol. 6, no. 3, Dec. 2020, pp. 58-71, doi:10.20319/mijst.2020.63.5871.