TY  - RPRT
TI  - Commerce versus collaboration.
AU  - B A Helm
AU  - E A Padlan
PY  - 1991
DO  - 10.1016/0140-6736(91)93304-r
UR  - https://pubmed.ncbi.nlm.nih.gov/1675734/
ID  - 1675734
ER  -