sentence: compositions espejismos ( 10 ' ) : flute , oboe , clarinet , vibraphone , percussion , piano , harpsichord , violin , viola , cello , tape ( 1977 ) suite apócrifa ( 12 ' ) : piano ( 1978 ) quasi variazioni ( 9 ' ) : flute , oboe , clarinet , horn , bassoon , violin , viola , cello , bass , piano , 4 female voices ( 1979 ) concierto en do ( 10 ' 40 '' ) : double quintet and piano ( 1979 ) rondó , op .