GRUODĖ, G.; ACHONEN, I.; VARIAKOJIENE, J. Pandemic Impact on Lithuania‘s tour operators. Turystyka i Rozwój Regionalny, [S. l.], n. 15, p. 59–67, 2021. DOI: 10.22630/TIRR.2021.15.6. Disponível em: https://tirr.sggw.edu.pl/article/view/3351. Acesso em: 4 grudz. 2024.