Tim Wildschut et al., “Nostalgia: Content, Triggers, Functions,” Journal of Personality and Social Psychology 91, no. 5 (2006): 975–993.

Clay Routledge et al., “The Past Makes the Present Meaningful: Nostalgia as an Existential Resource,” Journal of Personality and Social Psychology 101, no. 3 (2011): 638–622; Wijnand A. P. van Tilburg, Constantine Sedikides, and Tim Wildschut, “The Mnemonic Muse: Nostalgia Fosters Creativity Through Openness to Experience,” Journal of Experimental Social Psychology 59 (2015): 1–7.