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Arief-Ang, I.B.; Hamilton, M.; Salim, F. (2018-06-01). "RUP: Large Room Utilisation Prediction with carbon dioxide sensor". Pervasive and Mobile Computing. 46: 49–72. doi:10.1016/j.pmcj.2018.03.001. ISSN1873-1589. S2CID13670861.