| Dated: | 1983 |
| Instrumentation: | String Quartet |
| Timing: | 16' |
| Premiere: | June 8, 1983 in Lisbon, performed by the Arditti String Quartet |
| Dedicated to: | Arditti String Quartet |
| Commissioned by: | Fundaçâo Calouste Gulbenkian |
| Published: | Editions Salabert 17763 |
| Recordings available on Disques Montaigne 782005, Gramavision 74402 and Salabert SCDP 020 |