Works for Viola
| Op. 38 | Canzona sopra un tema di Monteverdi (1968) for Brass Nonet and Viola |
| Op. 47 | String Sextet: Nun komm’ der Heiden Heiland (1970, rev. 1997) for String Sextet (Two Violins, Two Violas, Two Cellos) |
| Op. 86 | Besos sin cuento (1989) for Alto, Flute, Viola, and Harp |
| Op. 94 | A Duet for Violas (1991) for Two Violas |
| Op. 124 | Minyan (2013) for Viola and Guitar |