[1]
P. K. Kućmierz, Łukasz Mazurkiewicz, and A. Walanus, “Selected economic factors impacting tourist travel in Poland between 2000 and 2012 and a forecast for 2013–2017”, geotour, no. 36, p. 25, Jun. 2014, doi: 10.7494/geotour.2014.36.25.