ŁUKASIEWICZ, K. Arrivals of Foreigners to Poland with Particular Emphasis on Visitors from Outside the Schengen Area – Characteristics and Prospects for the Future. Zeszyty Naukowe SGGW w Warszawie - Problemy Rolnictwa Światowego, [S. l.], v. 16, n. 4, p. 213–222, 2016. DOI: 10.22630/PRS.2016.16.4.114. Disponível em: https://prs.sggw.edu.pl/article/view/3491. Acesso em: 5 maj. 2024.