Muhamad Amir W Ahmad, Wan, et al. “Using Decision Tree and Response Surface Methodology to Review Chronic Periodontitis Profile in Pakistan: A Preliminary Case Study”. International Journal of Engineering & Technology, vol. 7, no. 3.28, Aug. 2018, pp. 76-79, https://doi.org/10.14419/ijet.v7i3.28.20971.