TY  - RPRT
TI  - Expert system reasoning about dynamic systems by semi-quantitative simulation.
AU  - L E Widman
PY  - 1989
DO  - 10.1016/0169-2607(89)90078-3
UR  - https://pubmed.ncbi.nlm.nih.gov/2743755/
ID  - 2743755
ER  -