1. Local and fuzzy logics;Bellmann,1977
2. Systems Analysis and Design for Safety;Brown,1976
3. Fuzzy real algebra: Some results;Dubois;Fuzzy Sets and Systems,1979
4. The Logic of Inexact Concepts;Goguen;Synthese,1969
5. The Fault Tree Technique of System Safety Analysis as Applied to the Occupational Safety Situation;Kolodner,1971