Webster, C., C.-L. (Alan) Yen, and S. Hji-Avgoustis. “Individual Perceptions of the Value of Leisure: The Influence of the Social Democratic Welfare State and Leftist Values Systems”. European Journal of Tourism Research, vol. 24, Mar. 2020, p. 2402, https://ejtr.vumk.eu/index.php/about/article/view/404.