This translation originally published, New York: Farrar, Straus & Giroux, 1968. Originally published as 'Unmögliche Beweisoufnahme' in his 'Spirale'. Frankfurt: Suhrkamp, 1956.
The impossible proof by Hans Erich Nossack. ISBN 0214667685. Published by Barrie & Rockcliff the Cresset P. in 1969. Publication and catalogue information, links to buy online and reader comments.