Wills, Gary Brian, Jonathon S Hare, Jiri Kajaba, David Argles, Lester Gilbert, and Dave E Millard. 2008. “A Delivery Engine for QTI Assessments”. International Journal of Emerging Technologies in Learning (iJET) 3 (July):pp. 71-76. https://doi.org/10.3991/ijet.v3i0.551.