Ngoc BH, Hai LM. Time-Frequency Nexus between Tourism Development, Economic Growth, Energy Consumption, and Ecological Footprint in Singapore. J. Rev. Global Econ. [Internet]. 2022 Aug. 28 [cited 2024 Dec. 25];11:22-3. Available from: http://lifescienceglobalca.com/index.php/jrge/article/view/8787