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@Article{PhysRevSTPER.2.010106,
  title = {Effects of representation on students solving physics problems: A fine-grained characterization},
  author = {Kohl, Patrick B. and Finkelstein, Noah D.},
  journal = {Phys. Rev. ST Phys. Educ. Res.},
  volume = {2},
  number = {1},
  pages = {010106},
  numpages = {12},
  year = {2006},
  month = {May},
  doi = {10.1103/PhysRevSTPER.2.010106},
  publisher = {American Physical Society}
}