TY  - RPRT
TI  - Patents alert
AU  - EM Williamson
PY  - 1999
DO  - 10.1002/(sici)1099-1573(199908/09)13:5<453::aid-ptr546>3.0.co;2-3
UR  - https://pubmed.ncbi.nlm.nih.gov/10441794/
ID  - 10441794
ER  -