1. Perceived insufficient sleep among adults in United States 2008;US Centers for Disease Control and Prevention (CDC);MMWR Morb Mortal Wkly Rep,2009
2. Sleep in America poll: communications technology in the bedroom;National Sleep Foundation,2011
3. “Sleep in America” poll 2002;National Sleep Foundation,2002
4. Enquête. Sommeil et rythme de vie,2009
5. Secular trends in adult sleep duration: a systematic review;Bin;Sleep Med Rev,2011