«Survival is Not Enough», 2010, Xanthippe Verlag, 432 pages, ISBN No. 978‐3‐905795‐11‐0 with a foreword by Fritz Fahrni.
«Generation Change in Small and Medium‐sized Enterprises»
«Generation Change in Small and Medium‐sized Enterprises», 1994, Gabler Verlag, 469 pages, ISBN No. 3‐8244‐6026‐2 with a preface by Hans Jobst Pleitner.