TY  - RPRT
TI  - Boundaries as pre-conditions.
AU  - A Goldberg
PY  - 1999
DO  - 10.1002/j.2167-4086.1999.tb00533.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10432533/
ID  - 10432533
ER  -