OVCHAROV, Anton Olegovich. Methodological Problems of Statistical Study of Regional Tourism and Tourist Expenditure. Economy of Regions, [S. l.], v. 11, n. 1, p. 281–287, 2015. DOI: 10.17059/2015-1-25. Disponível em: https://www.economyofregions.org/ojs/index.php/er/article/view/2334. Acesso em: 17 jun. 2026.