5B.L.Fredrickosn."Positive Emotions Broaden the Scope of Attention and Thought-action Repertories". Cognition andEmotion . 2005
6A.M.Isen."Some Perspectives on Positive Feelings and Emotions:Positive Affect Facilitates Thinking and Problem Sol-ving". Feelings and Emotions:The Amsterdam symposium . 2004
7A.B.Burns,J.S.Brown,N.Sachs-Ericsson,et al."Upward Spirals of Positive Emotion and Coping:Replication,Extension,and Initial Exploration of Neurochemical Substrates". Personality&Individual Differences . 2008
8B.L.Fredrickson,C.Branigan."Positive Emotions". Emotion:Current Issues and Fu-ture Directions . 2001
