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APA Citation
Elmunim, N., Abdullah, M., Hasbi, A., & Bahari, S. (2017). comparison of GPS TEC variations with Holt-Winter method and IRI-2012 over Langkawi, Malaysia. Advances in space research, 60(2), 276–285. http://access.bl.uk/ark:/81055/vdc_100046743869.0x000042