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@Article{PhysRevSTPER.2.020108,
  title = {Initiation of student-TA interactions in tutorials},
  author = {Scherr, Rachel E. and Russ, Rosemary S. and Bing, Thomas J. and Hodges, Raymond A.},
  journal = {Phys. Rev. ST Phys. Educ. Res.},
  volume = {2},
  number = {2},
  pages = {020108},
  numpages = {9},
  year = {2006},
  month = {Dec},
  doi = {10.1103/PhysRevSTPER.2.020108},
  publisher = {American Physical Society}
}