Lemmens HJ, Dyck JB, Shafer SL, Stanski DR (September 1994). "Pharmacokinetic-pharmacodynamic modeling in drug development: application to the investigational opioid trefentanil". Clinical Pharmacology and Therapeutics. 56 (3): 261–71. doi:10.1038/clpt.1994.136. PMID7924121. S2CID2058962.
Mounteney J, Giraudon I, Denissov G, Griffiths P (July 2015). "Fentanyls: Are we missing the signs? Highly potent and on the rise in Europe". The International Journal on Drug Policy. 26 (7): 626–31. doi:10.1016/j.drugpo.2015.04.003. PMID25976511.
Lemmens HJ, Dyck JB, Shafer SL, Stanski DR (September 1994). "Pharmacokinetic-pharmacodynamic modeling in drug development: application to the investigational opioid trefentanil". Clinical Pharmacology and Therapeutics. 56 (3): 261–71. doi:10.1038/clpt.1994.136. PMID7924121. S2CID2058962.
Mounteney J, Giraudon I, Denissov G, Griffiths P (July 2015). "Fentanyls: Are we missing the signs? Highly potent and on the rise in Europe". The International Journal on Drug Policy. 26 (7): 626–31. doi:10.1016/j.drugpo.2015.04.003. PMID25976511.