Developing a Common Metric in Item Response Theory: An Area-Minimization Approach. Raju, N. S. & Arenson, E. 2002.
Developing a Common Metric in Item Response Theory: An Area-Minimization Approach. [link]Paper  bibtex   
@article{ raju_developing_2002,
  title = {Developing a Common Metric in Item Response Theory: An Area-Minimization Approach.},
  shorttitle = {Developing a Common Metric in Item Response Theory},
  url = {http://eric.ed.gov/?id=ED464132},
  urldate = {2014-11-18TZ},
  author = {Raju, Nambury S. and Arenson, Ethan},
  year = {2002}
}

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