WIKTOROWICZ, Józef. Die Grammatikalisierung der Partikel schon. Studia Germanica Posnaniensia, [S. l.], n. 33, p. 165–171, 2013. DOI: 10.14746/sgp.2013.33.15. Disponível em: https://pressto.amu.edu.pl/index.php/sgp/article/view/2610. Acesso em: 27 luty. 2024.