T. N. Pham, T. T. Truong, T. L. M. Do, T. T. Nguyen, and T. T. T. Do, “The nonlinear effect of international tourism on income inequality: Testing the Kuznets curve hypothesis”, HCMCOUJS - ECONOMICS AND BUSINESS ADMINISTRATION, vol. 16, no. 1, pp. 111–127, Sep. 2025.