變更

*[https://www.theguardian.com/music/2021/jul/12/frederic-rzewski-obituary 衛報-Frederic Rzewski obituary]

*[https://www.nytimes.com/2021/06/27/arts/music/frederic-rzewski-dead.html The New York Times-2021/6/27 · Frederic Rzewski, a formidable composer and pianist who wrote and performed music that was at once stylistically eclectic and politically committed, died on Saturday]