Linking stable and dynamic features of positive affect to sleep
Annals of Behavioral Medicine (2013) - Comment
pubmed: 23483378  doi: 10.1007/s12160-013-9484-8  issn: 1532-4796  issn: 0883-6612 

Anthony D. Ong, Deinera Exner-Cortens, Catherine Riffin, Andrew Steptoe, Alex Zautra, David M. Almeida