HELBIG, Gerhard. Tendenzen und Probleme der neueren Partikel-Forschung. Studia Germanica Posnaniensia, [S. l.], v. 16, p. 147–162, 2018. DOI: 10.14746/sgp.1989.16.08. Disponível em: https://pressto.amu.edu.pl/index.php/sgp/article/view/16002. Acesso em: 27 kwi. 2024.