Tamara Sumner, Kirsten R. Butcher, Philipp G. Wetzler. Open Educational Resource Assessments (OPERA). In Vincent Aleven, Judy Kay, Jack Mostow, editors, Intelligent Tutoring Systems, 10th International Conference, ITS 2010, Pittsburgh, PA, USA, June 14-18, 2010, Proceedings, Part II. Volume 6095 of Lecture Notes in Computer Science, pages 414-416, Springer, 2010. [doi]
Abstract is missing.