American perceptions of the South Slavs : 1875 - 1941

by Jelavich, Charles
Published in Rad Jugoslavenske Akademije Znanosti i Umjetnosti (1984)

Slavs in North-Eastern Germany

by Carsten, F. L.
Published in The Economic History Review, Bd.11 (1941)

The oldest historical bases of german-Slav relations

by Ludat, Herbert
Published in Eastern Germany, Bd.2 (1963)