Shahizam, S. I., Abd Hamid, N. Z., & Side, S. (2021). Forecasting Carbon Monoxide (CO) Pollutant in Putrajaya using the Local Mean Approximation Method: Peramalan Bahan Pencemar Karbon Monoksida (CO) di Putrajaya Menggunakan Kaedah Penghampiran Purata Setempat. Journal of Science and Mathematics Letters, 9, 63–71. https://doi.org/10.37134/jsml.vol9.sp.8.2021