@article{SchmidtBrunnerPreckel2017,
  author    = {Isabelle Schmidt and Martin Brunner and Franzis Preckel},
  title     = {Effects of achievement differences for internal/external frame of reference model investigations},
  journal   = {British journal of educational psychology},
  series    = {A test of robustness of findings over diverse student samples},
  volume    = {88},
  number    = {4},
  pages     = {513 -- 528},
  doi       = {10.1111/bjep.12198},
  year      = {2017},
}