1
2
3
4
Published: 2012,, c1980.
Superior document: Bulgarische Sammlung ; Band 1
5
Published: 2012,, c1980.
Superior document: Bulgarische Sammlung ; Band 1
6
Published: 2012,, c1990.
Superior document: Bulgarische Sammlung ; Band 7
7
Published: 2012,, c1984.
Superior document: Südosteuropa-Studien ; Heft 35
8
Published: 2012,, c1982.
Superior document: Südosteuropa-Studien ; Heft 30