TY  - JOUR
TI  - A qualitative physics based on confluences
AU  - Johan de Kleer
AU  - John Seely Brown
PY  - 1984
JO  - Artificial Intelligence
DO  - 10.1016/0004-3702(84)90037-7
UR  - https://doi.org/10.1016/0004-3702(84)90037-7
ER  -