Cross-country skiing as a factor in adolescent physical activity and health education: a theoretical aspect. Laisvalaikio tyrimai, [S. l.], v. 1, n. 25, p. 1–20, 2025. DOI: 10.33607/elt.v1i25.1626. Disponível em: https://journals.lsu.lt/laisvalaikio-tyrimai/article/view/1626. Acesso em: 20 aug. 2026.