SCHULTZ, Peter. Advanced German Interactive video language learning with "Ein Fall für Zwei". CALICO Journal, [S. l.], v. 19, n. 3, p. 629–638, 2013. DOI: 10.1558/cj.35166. Disponível em: https://journal.equinoxpub.com/Calico/article/view/16970.. Acesso em: 16 jul. 2024.