Writing

2015		Jonas Kaufmann: Cavalleria Rusticana / Pagliacci … Writer
2015		The Metropolitan Opera: Cavalleria Rusticana & Pagliacci … Writer
2015		Puccini Manon Lescaut … Writer

2014

… Writer

1998

… Writer

1997

… Writer

1987

… Writer

1983

… Writer

1978

… Writer

1970

… Writer

1948

… Opera

1943

… Story

1936

… Writer

1934

… Opera