| web | http://www.sciencedaily.com/releases/2012/07/120727095555.htm |
| publication | ScienceDaily |
| date | 2012-07-27 |
| web | Dresler M, Wehrle R | Sleep | 2012-07-01 | |
| web | Dresler M, Wehrle R | Sleep | 2012-07-01 |
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