PICHELMANN, Karl. Arbeitslose und offene Stellen: The unemployment/vacancy curve. Theoretical foundation and empirical relevance. Studies in empirical economics. Wirtschaft und Gesellschaft, Wien, Österreich, v. 19, n. 4, p. 585–586, 1993. Disponível em: https://journals.akwien.at/index.php/wug/article/view/1759.. Acesso em: 23 mar. 2026.