GRÜN, S. 25 Jahre Wahl BKZ-Sportler des Jahres. Backnanger Jahrbuch, [S. l.], v. 22, p. 268–269, 2014. DOI: 10.53458/bjb.v22i.9609. Disponível em: https://journals.wlb-stuttgart.de/ojs/index.php/bjb/article/view/9609. Acesso em: 3 juli. 2024.