ACKERMANN, C. 20 Jahre Troubadix: 20 Jahre Begeisterung für’s Singen. Backnanger Jahrbuch, [S. l.], v. 25, p. 239–240, 2017. DOI: 10.53458/bjb.v25i.9872. Disponível em: https://journals.wlb-stuttgart.de/ojs/index.php/bjb/article/view/9872. Acesso em: 22 juli. 2024.