@article{ChmielewskiDumontTrautwein2013,
  author    = {Anna K. Chmielewski and Hanna Dumont and Ulrich Trautwein},
  title     = {Tracking Effects Depend on Tracking Type},
  journal   = {American Educational Research Journal},
  series    = {An International Comparison of Students' Mathematics Self-Concept},
  volume    = {50},
  number    = {5},
  pages     = {926 -- 957},
  doi       = {10.3102/0002831213489843},
  url       = {http://journals.sagepub.com/doi/pdf/10.3102/0002831213489843},
  year      = {2013},
}