Coro, manuscripts
Luciano Berio's outline for Coro (Paul Sacher Stiftung, Collection Luciano Berio, file «Coro» in «Analysen», f. 1r)
Berio's analysis of Mahler's Andante from the Sixth Symphony (Paul Sacher Stiftung, Collection Luciano Berio, file «Coro» in «Analysen», f. 1v)
Simha Arom's sketch of Ndèrèjé baléndor, tracing inherent patterns in a passage of Banda Linda heterophony (Paul Sacher Stiftung, Collection Luciano Berio, file «Coro» – partial reproduction)