The European Bibliography of Slavic and East European Studies (EBSEES) - 1991-2007

The European Bibliography of Slavic and East European Studies (EBSEES) collects books, journal articles, reviews and dissertations from Eastern Europe (former countries of Eastern Bloc) which were published in Belgium, Germany, Finland, France, Great Britain, the Netherlands, Austria and Switzerland from 1991 to 2007. The segment "Literature" and "Culture" of the European Bibliography of Slavic and East European Studies contains 18.000 bibliographic entries (from the total asset of 85.000). More information can be found here.

Your search for Heppner, Harald provides 12 hits
11	Modernisierung der Politik als Strukturproblem in Südosteuropa Heppner, Harald, in: Österreichische Osthefte, 37(3), 1995, p. 717-46
12	Geschichte als interkulturelle Suche: Der Fall Südosteuropa Heppner, Harald, in: Geschichte und Gegenwart, 14(2), 1995, p. 115-25

The European Bibliography of Slavic and East European Studies (EBSEES) - 1991-2007

Modernisierung der Politik als Strukturproblem in Südosteuropa

Geschichte als interkulturelle Suche: Der Fall Südosteuropa