Reference 1 in the originally published paper should have referenced our CVPR 2008 paper.

Manfred Georg, Richard Souvenir, Andrew Hope, and Robert Pless,
Simultaneous Data Volume Reconstruction and Pose Estimation from Slice Samples,
In Computer Vision and Pattern Recognition (CVPR), June 2008.

This is corrected on the PDF available on my website.

The original paper can be found here.