Edwards PET, Parsons GR, Myers KH. The economic value of viewing migratory shorebirds on the Delaware Bay: an application of the single-site travel cost model using on-site data. Hum Dimens Wildl. 2011;16(6):435-44. doi: 10.1080/10871209.2011.608180
Melendez J, Galli I, Boric K, Ortega A, Zuniga L, Henriquez-Roldan CF, Cardenas AM. Zolpidem and triazolam do not affect the nocturnal sleep-induced memory improvement. Psychopharmacology (Berl). 2005 Aug;181(1):21-6. doi: 10.1007/s00213-005-2228-0
Dykstra LA, Granger AL, Allen RM, Zhang X, Rice KC. Antinociceptive effects of the selective delta opioid agonist SNC80 alone and in combination with mu opioids in the squirrel monkey titration procedure. Psychopharmacology (Berl). 2002 Oct 1;163(3-4):420-9.
Hoogeveen EK, Rothman KJ. Hyperhomocysteinemia increases the risk of death in type 2 diabetes. Cardiovasc Rev Rep. 2001;22:207-12.