European Krzysztof Penderecki Music Centre, Lusławice (Polen)
http://penderecki-center.pl/

Ludwig van Beethoven Easter Festival, Warschau (Polen)
www.beethoven.org.pl

Schott Music
www.schott-music.com

Wergo
www.wergo.de
International Krzysztof Penderecki Society e.V.
European Krzysztof Penderecki Music Centre, Lusławice (Polen)
http://penderecki-center.pl/
Ludwig van Beethoven Easter Festival, Warschau (Polen)
www.beethoven.org.pl
Schott Music
www.schott-music.com
Wergo
www.wergo.de