@misc{CsikszentmihalyiSchiefele2009,
  author    = {Mihaly Csikszentmihalyi and Ulrich Schiefele},
  title     = {Motivation and ability as factors in mathematics experience and achievement},
  institution = {Department Psychologie},
  series    = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  number    = {paper 065},
  type      = {postprint},
  year        = {2009},
}