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  author       = {Bieda, A. and Hirschfeld, Gerrit and Schoenfeld, P. and Brailovskaia, J. and Lin, M. and Margraf, J.},
  issn         = {0092-6566},
  journal      = {Journal of Research in Personality},
  pages        = {198--209},
  title        = {{Happiness, Life Satisfaction and Positive Mental Health: Investigating Reciprocal Effects over Four Years in a Chinese Student Sample}},
  volume       = {78},
  year         = {2019},
}

@article{462,
  author       = {Hirschfeld, Gerrit and von Brachel, R. and Thielsch, M.},
  issn         = {0092-6566},
  journal      = {Journal of  Research in Personality},
  pages        = {54--63},
  title        = {{Selecting items for Big Five questionnaires: At what sample size do factor loadings stabilize?}},
  volume       = {53},
  year         = {2014},
}