The mnemonic mover: nostalgia regulates avoidance and approach motivation
Emotion (2014) - Comment
pubmed: 24708500  doi: 10.1037/a0035673  issn: 1931-1516  issn: 1528-3542 

Elena Stephan, Tim Wildschut, Constantine Sedikides, Xinyue Zhou, Wuming He, Clay Routledge, Wing-Yee Cheung, Ad J. J. M. Vingerhoets