By Yu Z.   Starr A.   Haldeman S.   Chu J.   Fredrickson B.   Hasen Y.   Weber R.   in Electroencephalography and Clinical Neurophysiology

ISSN:0013-4694|103|1|68-69

Elsevier‎(1997)‎

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By Miner-Rubino K.   Twenge J.M.   Fredrickson B.L.   in Journal of Research in Personality

ISSN:0092-6566|36|2|147-172

Elsevier‎(2002)‎

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By Palmer C.T.   Fredrickson B.E.   Tilley C.F.   in Evolution and Human Behavior

ISSN:1090-5138|18|5|291-308

Elsevier‎(1997)‎

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