Mohd Napi, Nur Nazmi Liyana, et al. “Different Approaches of Multiple Linear Regression (MLR) Model in Predicting Ozone (O3) Concentration in Industrial Area”. International Journal of Integrated Engineering, vol. 15, no. 1, Apr. 2023, pp. 106-17, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/9230.