4) Van der Heijden, K.: .Scenarios-The Art of Strategic Conversation, Wiley, Chichester, 1996.
5) Van der Heijden, K.: .Scenarios, Strategies and the Strategy Process, Bruekelen, Nijenrode Univ. Press, Nijenrode Research Papers Series-Centre for Organizational Learning and Change; No. 1997-01, 1997.