Vivien Petras Natalia Perelman Fredric C. Gey Using Thesauri in Cross-Language Retrieval of German and French Indexed Collections. 349-362 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2785&spage=349 2002 conf/clef/2002 CLEF db/conf/clef/clef2002.html#PetrasPG02