LÜLL, M. WLB in Zahlen. WLBforum, Stuttgart, v. 11, n. 1, p. 7, 2009. DOI: 10.53458/wlbf.v11i1.403. Disponível em: https://journals.wlb-stuttgart.de/ojs/index.php/wlbf/article/view/403. Acesso em: 29 märz. 2024.