Kurniawati, Riska, et al. “Vidsray: Covid Sensor Based on WFDCF Technology and Automatic Spraying With IVY Plant Extract to Prevent Spread of Covid-19”. Asian Journal of Mechatronics and Electrical Engineering, vol. 1, no. 1, Sept. 2022, pp. 53-60, doi:10.55927/ajmee.v1i1.1312.