TY  - RPRT
TI  - Defining intractability: comparisons among published definitions.
AU  - Anne T Berg
AU  - Molly M Kelly
PY  - 2006
DO  - 10.1111/j.1528-1167.2006.00440.x
UR  - https://pubmed.ncbi.nlm.nih.gov/16499772/
ID  - 16499772
ER  -