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Grit Across Nations: The Cross-National Equivalence of the Grit-O ScaleLlewellyn E. van Zyl, Leander van der Meij, Babet Heijenk et al.|Journal of Happiness Studies|2022Cited by 22
Best-Practice Guidelines for Positive Psychological Intervention Research DesignLlewellyn E. van Zyl, Rébecca Shankland, Sebastiaan Rothmann et al.|Unknown|2019Cited by 21