Shahizam, Shahidatul Idayu, Nor Zila Abd Hamid, and Syafruddin Side. 2021. “Forecasting Carbon Monoxide (CO) Pollutant in Putrajaya Using the Local Mean Approximation Method”. Journal of Science and Mathematics Letters 9 (February), 63-71. https://doi.org/10.37134/jsml.vol9.sp.8.2021.