Duong Nguyen Minh Huy, and Do Anh Duc. “Travelling, Retail Activities, Trade Openness and COVID-19 Incidence in Vietnam”. The VMOST Journal of Social Sciences and Humanities, vol. 65, no. 2, Aug. 2023, pp. 26-31, doi:10.31276/VMOSTJOSSH.65(2).26-31.