.
Lehmiller, Justin. «Sex Question Friday: Why Can’t I Maintain Sexual Interest in One Person?» Sex and Psychology blog. Accessed May 3, 2016. http://www.lehmiller.com/blog/2014/12/19/sex-question-friday-why-cant-i-maintain-sexual-interest-in-one-person.
Lynch, C. D., R. Sundaram, J. M. Maisog, A. M. Sweeney, and G. M. Buck Louis. «Preconception Stress Increases the Risk of Infertility: Results From a Couple-Based Prospective Cohort Study — the LIFE Study». Human Reproduction 29, no. 5 (May 2014): 1067–1075. doi: 10.1093/humrep/deu032.
Mayberg, Helen S., J. Arturo Silva, Steven K. Brannan, Janet L. Tekell, Roderick K. Mahurin, Scott McGinnis, and Paul A. Jerabek. «The Functional Neuroanatomy of the Placebo Effect». American Journal of Psychiatry 159, no. 5 (May 1, 2002): 728–737. doi: 10.1176/appi.ajp.159.5.728.
National Center for Biotechnology Information. «Sildenafil Citrate». Accessed May 3, 2016.
NPR. «‘Two-Buck Chuck’ Snags Top Wine Prize». Accessed May 2, 2016. http://www.npr.org/templates/story/story.php?storyId=1963794.
Park, Ji Kyung, and Deborah Roedder John. «Got to Get You Into My Life: Do Brand Personalities Rub Off on Consumers?» Association for Consumer Research 38. Accessed May 11, 2016. http://www.acrwebsite.org/volumes/15957/volumes/v38/NA-38.
Park, Ji Kyung, and Deborah Roedder John. «I Think I Can, I Think I Can: Brand Use, Self-Efficacy, and Performance». Journal of Marketing Research 51, no. 2 (March 5, 2014): 233–247. doi: 10.1509/jmr.11.0532.
Perlis, Michael, Michael Grandner, Jarcy Zee, Erin Bremer, Julia Whinnery, Holly Barilla, Priscilla Andalia, et al. «Durability of Treatment Response to Zolpidem With Three Different Maintenance Regimens: A Preliminary Study». Sleep Medicine 16, no. 9 (September 2015): 1160–1168. doi: 10.1016/j.sleep.2015.06.015.
Ross, Ramzy, Cindy M. Gray, and Jason M. R. Gill. «Effects of an Injected Placebo on Endurance Running Performance». Medicine and Science in Sports and Exercise 47, no. 8 (August 2015): 1672–1681. doi: 10.1249/MSS.0000000000000584.
Substance Abuse and Mental Health Services Administration. «National Survey on Drug Use and Health». Accessed May 11, 2016. https://nsduhweb.rti.org/respweb/homepage.cfm.
Vinson, Joe A., Bryan R. Burnham, and Mysore V. Nagendran. «Randomized, Double-Blind, Placebo-Controlled, Linear Dose, Crossover Study to Evaluate the Efficacy and Safety of a Green Coffee Bean Extract in Overweight Subjects». Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy 5 (January 18, 2012): 21–27. doi: