1. Causal Models in Marketing;Bagozzi,1980
2. Why did R&D-projects succeed or fail;Baker;Res. Manag.,1986
3. Critical signals for go/no go decisions in new product development;Balachandra;J. Prod. Innov. Manag.,1984
4. Early Warning Signals for R&D Projects;Balachandra,1989
5. How to decide when to abandon a project;Balachandra;Res. Manag.,1980