BLUSIEWICZ , Tomasz; STÖCKER , Lars Fredrik; MITTER , Adrian. Unofficial Trade and Business Practices in the Baltic Sea Region in the Twentieth Century . Zeitschrift für Ostmitteleuropa-Forschung, [S. l.], v. 68, n. 4, p. 521–525, 2019. DOI: 10.25627/201968410686. Disponível em: https://openjournals.osmikon.de/zfo/article/view/10686. Acesso em: 16 sep. 2026.