Tancas serradas a muru (Ayre)

Whose song is Tancas serradas a muru (Ayre)?

Artist Album
Golijov Oswaldo, Berio Luciano
Golijov-Ayre, Berio-Folk Songs - Dawn Upshaw
Goljijov, O - Ayre (DGG2.19)
Andalucian Dogs & Dawn Upshaw sopran