TY  - RPRT
TI  - Reasoning about data with directed graphs.
AU  - D Tritchler
PY  - 1999
DO  - 10.1002/(sici)1097-0258(19990830)18:16<2067::aid-sim182>3.0.co;2-2
UR  - https://pubmed.ncbi.nlm.nih.gov/10441763/
ID  - 10441763
ER  -