Kosmaczewska, J. “TOURISM INTEREST AND THE EFFICIENCY OF ITS UTILISATIONS BASED ON THE EXAMPLE OF THE EU COUNTRIES”. Acta Scientiarum Polonorum. Oeconomia, Vol. 13, no. 1, Mar. 2014, pp. 77-90, https://js.wne.sggw.pl/index.php/aspe/article/view/4109.