K. . Wangpayon, K. . Somphol, N. . Chaiyawong, R. . Kaphueak, S. . Choobkunthot, and pratueng moungon, “Potentials and underground economy at the Cow-Carabao Market, Ban Yang, Tambon Bung Mai, Amphoe Warin Chamrap, Ubon Ratchathani”, GJL, vol. 11, no. 1, pp. 143–155, May 2022.