Hart, E. ., Lakerveld, J. ., McKee, M. ., Oppert, J. ., Rutter, H. ., Charreire, H. ., … Mackenbach, J. . Contextual correlates of happiness in European adults. PloS One, 13(1), e0190387. https://doi.org/10.1371/journal.pone.0190387 (Original work published 2018)