Brida, J. ., W. . Risso, E. . Carrera, and E. . Carrera. “Real Wages As Determinant of Labour Productivity in the Mexican Tourism Sector”. European Journal of Tourism Research, vol. 3, no. 1, Mar. 2010, pp. 67-76, https://ejtr.vumk.eu/index.php/about/article/view/46.