1. You can bank on uncertainty;Kabus;Harvard Business Review,1976
2. Steady state and portfolio concept in R & D management;Balthasar;R & D Management,1975
3. Calling shots in R & D;Balthasar;Harvard Business Review,1978
4. Investment analysis at Hoffmann-La Roche;Dangel,1976
5. Decision analysis: applied decision theory;Howard,1968