SARMENTO, Elsa de Morais; NUNES, Alcina. The evolution of the sectoral concentration in Portugal between 1995 and 2006: the Herfindahl-Hirschman index perspective. Tourism & Management Studies, [S. l.], v. 11, n. 2, p. 146–158, 2024. Disponível em: https://www.tmstudies.net/index.php/ectms/article/view/823.. Acesso em: 29 apr. 2024.