@article{RheinbergVollmeyerRollett2000,
  author    = {Rheinberg, Falko and Vollmeyer, Regina and Rollett, Wolfram},
  title     = {Motivation and learning in a computer-simulated system},
  year      = {2000},
  language  = {en}
}
@article{RheinbergVollmeyerRollett2000,
  author    = {Rheinberg, Falko and Vollmeyer, Regina and Rollett, Wolfram},
  title     = {Motivation and action in self-regulated learning},
  isbn      = {0-12-109890-7},
  year      = {2000},
  language  = {en}
}
@article{VollmeyerRollettRheinberg1997,
  author    = {Vollmeyer, Regina and Rollett, Wolfram and Rheinberg, Falko},
  title     = {How motivation affects learning},
  year      = {1997},
  language  = {en}
}
@article{VollmeyerRollettRheinberg1998,
  author    = {Vollmeyer, Regina and Rollett, Wolfram and Rheinberg, Falko},
  title     = {Motivation and learning in a complex system},
  isbn      = {3-931147- 82-7},
  year      = {1998},
  language  = {en}
}