EHLERS, C. Achmett Schachbrett oder halt dich fest an meinen Ohren. https://revistascientificas.us.es/index.php/mAGAzin/issue/view/938, [S. l.], n. 7, p. 56–60, 2009. DOI: 10.12795/mAGAzin.2000.i07.10. Disponível em: https://revistascientificas.us.es/index.php/mAGAzin/article/view/8207. Acesso em: 18 jul. 2024.