1994 Junge Kunstler aus Prague, Kunstmuseum, Dusseldorf, Germany
1994 Sympozium of Jilek brothers, Glass Factory, Kamenický Šenov, Czech Republic
1995 Das Gefas, Glassgallery Hittfeld, Germany
1995 Four Glass Schools, Schalkuujk, Holland
1996 Aperto Vetro, Museo Vetrario, Murano, Venice, Italy / The First Prize of Art Colleges /
1997 Young Czech Glass, Glassgallery Hittfeld, Germany
1999 International Symposium of Engraved Glass, Kamenický Šenov, Czech Republic
1999 Kopecky and his students, Sogetsu Hall, Tokyo, Japan
1999 New Design for XXI st Century, Karlovy Vary, Czech Republic
2000 International Glass Symposium, Nový Bor, Czech Republic