Hamming, N. M., M. J. Daly, J. C. Irish, and J. H. Siewerdsen. “Automatic Image-to-World Registration Based on X-Ray Projections in Cone-Beam CT”. CMBES Proceedings, vol. 34, no. 1, June 2011, https://proceedings.cmbes.ca/index.php/proceedings/article/view/598.