1. Uncertainty in software-intensive systems;Littlewood;High Integrity Systems,1995
2. The need for evidence from disparate sources to evaluate safety;Littlewood,1993
3. Validation of ultra-high dependability for software-based systems;Littlewood;Comm. ACM,1993
4. Cognitive Development;Gross,1985
5. Principles from the psychology of thinking and mental models;Manktelew,1987