Lonnie R. Johnson, Central Europe. Enemies, Neighbours, Friends. Zeitschrift für Ostmitteleuropa-Forschung, Marburg, v. 62, n. 1, p. 108–109, 2013. DOI: 10.25627/20136219455. Disponível em: https://openjournals.osmikon.de/zfo/article/view/9455. Acesso em: 31 oct. 2026.