PIROŻNIK, Iwan. Socio-geographic problems of summer recreation development in the Soviet Union. Turyzm/Tourism, [S. l.], v. 1, n. 1, p. 9–30, 1991. DOI: 10.18778/0867-5856.1.1.02. Disponível em: https://czasopisma.uni.lodz.pl/tourism/article/view/10885. Acesso em: 23 jul. 2024.