Surono, S. ., Goh, K. W. ., Onn, C. W. . and Marestiani, F. . (2023) “Developing an optimized recurrent neural network model for air quality prediction using K-means clustering and PCA dimension reduction ”, International Journal of Innovative Research and Scientific Studies, 6(2), pp. 330–343. doi: 10.53894/ijirss.v6i2.1427.