GUO, R. and ZHONG, Z.W. 2017. FORECASTING AIR PASSENGER VOLUME IN SINGAPORE: DETERMINING THE EXPLANATORY VARIABLES FOR ECONOMETRIC MODELS. MATTER: International Journal of Science and Technology. 3, 1 (Jan. 2017), 123–139. DOI:https://doi.org/10.20319/mijst.2017.31.123139.