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* [https://www.nytimes.com/2012/09/23/opinion/sunday/rethinking-sleep.html?pagewanted=1&_r=0&ref=general&src=me Rethinking Sleep], David K. Randall, ''New York Times,'' September 2012
*[https://www.theatlantic.com/magazine/archive/2017/01/how-to-sleep/508781/ How to Sleep], James Hamblin, ''The Atlantic,'' January 2017
* [http://www.bedroompedia.com/find-best-mattress/ how to find the best mattress], Sobyschwartz, www.bedroompedia.com, June 2018
 
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