WALORCZYK, Mariusz. Optimizing Certificate German (ZD) Test Preparedness with Regard to Form of Task. Glottodidactica, [S. l.], v. 35, p. 129–138, 2009. DOI: 10.14746/gl.2009.35.10. Disponível em: https://pressto.amu.edu.pl/index.php/gl/article/view/16456. Acesso em: 9 dec. 2025.