Shahizam, S.I., Abd Hamid, N.Z. and 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, pp. 63–71. doi:10.37134/jsml.vol9.sp.8.2021.