Pierre Boulez | Pli Selon Pli No. 3 : Improvisation II / Pour Soprano Et Neuf Instrumentistes (1957).
Gioachino Rossini: Petite Messe solennelle - Sheet music | Buy choral sheet music
Feeling Good - 2011 IDS Messe Koeln - YouTube
Leonard Bernstein, Available Online, Leonard Bernstein Scrapbook: Vol. 115. April 12, 1986-July 19, 1986 (musbernstein.100071120.0/) | Library of Congress
Albert Schatz Collection, Available Online, Italian, German | Library of Congress