An, C.-H. . “A Study on the Estimation of Ultrafine Dust (PM2.5) Prediction Model by Vector Error Correction (VECM)”. International Journal of Intelligent Systems and Applications in Engineering, vol. 10, no. 1s, Oct. 2022, pp. 163 -, https://ijisae.org/index.php/IJISAE/article/view/2252.