@article{GraessmannSchultheissBrunstein1998,
  author    = {Gr{\"a}ssmann, Ruth and Schultheiss, Oliver and Brunstein, Joachim Clemens},
  title     = {Exploring the determinants of students' academic commitment},
  isbn      = {3- 931147-82-7},
  year      = {1998},
  language  = {en}
}
@article{BrunsteinSchultheissGraessmann1998,
  author    = {Brunstein, Joachim Clemens and Schultheiss, Oliver and Gr{\"a}ssmann, Ruth},
  title     = {Personal goals and emotional well-being : the moderating role of motive dispositions},
  year      = {1998},
  language  = {en}
}