TY  - RPRT
TI  - Validation and verification of expert systems using evidence flow graphs
AU  - Becker, Lee A.
AU  - Green, Peter E.
AU  - Duckworth, R. James
AU  - Bhatnagar, Jayant
PY  - 1989
UR  - https://ntrs.nasa.gov/citations/19900023441
ID  - 19900023441
ER  -