ZZZ-Mailing (sources)
- "Writing emails as part of sleepwalking after increase in Zolpidem," by preview in the Science Direct website). Pgs. 262-264. Online: http://www.sciencedirect.com/science/article/pii/S138994570800275X , article in Sleep Medicine, Vol. 10, Iss. 2, February 2009 (
- "Sleepwalking, Sleep Sex... Now Sleep E-Mailing?," by Audrey Grayson and the ABC News Medical Unit, article in the ABC News website, posted 12-17-2008, viewed 9-8-2017. Online: http://abcnews.go.com/Health/Sleep/sleepwalking-sleep-sex-now-sleep-mailing/story?id=6476686
- "ZZZ-Mail: What happens when sleepwalkers go online," by Rodger Dobson, article in The Telegraph website, posted 12-13-2008, viewed 9-10-2017. Online: http://www.telegraph.co.uk/news/newstopics/howaboutthat/3743289/Zzz-mail-What-happens-when-sleepwalkers-go-online.html