England, Paul (November 2019). "Arrow declarations: a creative new remedy, but what are its limits?". Pharmaceutical Patent Analyst. 8 (6): 217–219. doi:10.4155/ppa-2019-0024. PMID31718455. S2CID207963034.
England, Paul (November 2019). "Arrow declarations: a creative new remedy, but what are its limits?". Pharmaceutical Patent Analyst. 8 (6): 217–219. doi:10.4155/ppa-2019-0024. PMID31718455. S2CID207963034.
England, Paul (November 2019). "Arrow declarations: a creative new remedy, but what are its limits?". Pharmaceutical Patent Analyst. 8 (6): 217–219. doi:10.4155/ppa-2019-0024. PMID31718455. S2CID207963034.