Mary Lewis

Slovenian National Opera Company

Anneliese Schlosshauer

Käthe Nentwig

Claude Calès

Nadine Sautereau

Hedi Klug

Debbie Wiseman

Tsin Ting

Johanna Blatter

Miloslav Ježil

Giuliano Cianella

Orchestra del Teatro Communale di Genova

Peter Gougalov

Maria Grazia Allegri

Angelica Tuccari

Orchestra Simfonică A Filarmonicii Din Satu-Mare

George & Ira Gershwin

Vittorio Negri

Hedda Heusser

Horst Hiestermann

Radnai György

Fritz Strassner

Josephte Clément

Alexander Iokheles