TY  - RPRT
TI  - Feed-forward: future questions, future maps.
AU  - P Penn
PY  - 1985
DO  - 10.1111/j.1545-5300.1985.00299.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4043348/
ID  - 4043348
ER  -