Herausforderung der Bioethik, c1993 t.p. (Johann S. Ach) p. 278 (wissenschaftlicher Mitarbeiter am Philosophischen Seminar der Universität Münster)
Hirntod und Organverpflanzung, 1997 t.p. (Johann S. Ach)
Proceed with caution?, 2012 t.p. (Johann S. Ach) contributors' page (trained philosopher with a PhD and a Habilitation degree from the University of Münster. He is chief executive officer of the Centre of Bioethics (CfB) and scientific coordinator of the "Centre for Advanced Study in Bioethics" at Münster University)