Behrens, W., Hawranek, P.M.: Manual for the Preparation of Industrial
Feasibility Studies. UNIDO, Wienna 1991.
Senge, P. M.: The Fifth Discipline. The Art and Practice of the Learning
Organization. Doubleday, New York 1990.
Richardson, B., Richardson, R.: Business Planning. An Approach to Strategic
Management. Pitman Publishing, London, 1989.