X. Zeng et al., “The Effect of Loving-Kindness Meditation on Positive Emotions: A Meta-Analytic Review,” Frontiers in Psychology 6 (November 3, 2015): 1693, doi: 10.3389/fpsyg.2015.01693; B. L. Fredrickson et al., “Open Hearts Build Lives: Positive Emotions, Induced through Loving-Kindness Meditation, Build Consequential Personal Resources,” Journal of Personality and Social Psychology 95, no. 5 (November 2008): 1045–62, doi: 10.1037/a0013262.
