Changes

<ref name="pmid18680884">{{cite journal |first=A R |last=Ekirch |date=2001 |title=Sleep We Have Lost: Pre-industrial Slumber in the British Isles |journal=American Historical Review |volume=106 |issue=2 |pages=343-386 |doi=10.2307/2651611 |jstor=2651611 |pmid=18680884}}</ref>

<ref name="pmid18680884">{{cite journal |first=A R |last=Ekirch |date=2001 |title=Sleep We Have Lost: Pre-industrial Slumber in the British Isles |journal=American Historical Review |volume=106 |issue=2 |pages=343-386 |doi=10.2307/2651611 |jstor=2651611 |pmid=18680884}}</ref>

<ref name="pmid10607034">{{cite journal |first=T. A. |last=Wehr |date=June 1992 |title=In short photoperiods, human sleep is biphasic |journal=Journal of Sleep Research |volume=1 |issue=2 |pages=103–107 |doi=10.1111/j.1365-2869.1992.tb00019.x |pmid=10607034}}</ref>

<ref name="pmid10607034">{{cite journal |first=T. A. |last=Wehr |date=June 1992 |title=In short photoperiods, human sleep is biphasic |journal=Journal of Sleep Research |volume=1 |issue=2 |pages=103–107 |doi=10.1111/j.1365-2869.1992.tb00019.x |pmid=10607034}}</ref>

<ref name="bbc2012">{{cite news |first=Stephanie |last=Hegarty |title=The myth of the eight-hour sleep |work=[[BBC News]] |date=22 February 2012 |url=https://www.bbc.co.uk/news/magazine-16964783}}</ref>

<ref name="bbc2012">{{cite news |first=Stephanie |last=Hegarty |title=The myth of the eight-hour sleep |work=BBC News |date=22 February 2012 |url=https://www.bbc.co.uk/news/magazine-16964783}}</ref>

}}

}}

[[Category: Lifestyle]]

[[Category: Lifestyle]]

{{TNT|Polyphasic Lifestyle}}

{{TNT|Polyphasic Lifestyle}}