トリスタン・ケウリス
3 preludes for piano (1959, manuscript)
Baldur en de bosnymph - symfonisch gedicht (1960, manuscript)
Wind quintet (after Schönberg, 1962, lost)
String quartet (1963)
Songs on texts by Guillaume de Machaut (1964, lost?)
Quartet for Orchestra (1967)
Libra for clarinet and piano (1967?)
Quartet no.2 for orchestra (1969, published by Donemus, withdrawn before its 1st public performance)
Piano sonata (1970)
Altosaxophone concerto (1971)
Music for clarinet, violin and piano (1973)
Sinfonia (1972-'74)
Serenade for oboe and orchestra (1976)
Fantasia for flute solo (1976)
piano concerto for Theo Bruins (1976, not identical with the 1980 concerto, unfinished short score)
Violin sonata (1977)