Graham, Stuart J. H.; Higgins, Matthew J. (16 October 2009). "Balancing Innovation and Access: Patent Challenges Tip the Scales". Science. 326 (5951): 370–371. doi:10.1126/science.1176116. PMID19833944. S2CID26207932.
nih.gov
pubmed.ncbi.nlm.nih.gov
Graham, Stuart J. H.; Higgins, Matthew J. (16 October 2009). "Balancing Innovation and Access: Patent Challenges Tip the Scales". Science. 326 (5951): 370–371. doi:10.1126/science.1176116. PMID19833944. S2CID26207932.
semanticscholar.org
api.semanticscholar.org
Graham, Stuart J. H.; Higgins, Matthew J. (16 October 2009). "Balancing Innovation and Access: Patent Challenges Tip the Scales". Science. 326 (5951): 370–371. doi:10.1126/science.1176116. PMID19833944. S2CID26207932.