Volume Sculpting
S. Wang and A. Kaufman, Symposium on Interactive 3D Graphics, ACM Press, April 1995, pp.151-156.

Volume-Sampled 3D Modeling
S. Wang and A. Kaufman, IEEE Computer Graphics & Appplications 14(5), September 1994, pp.26-32.

Volume Sampled Voxelization of Geometric Primitives
S. Wang and A. Kaufman, IEEE Visualization '93 Proceedings, IEEE Computer Society Press, October 1993, pp. 78-84.

Volume Graphics
A. Kaufman, D. Cohen and R. Yagel, IEEE Computer, Vol. 26, No. 7, July 1993, pp. 51-64 Also in Japanese, Nikkei Computer Graphics, 1, No. 88, 148-155 & 2, No. 89, 130-137, 1994.

A Haptic Interaction Method for Volume Visualization
Ricardo S. Avila and Lisa M. Sobierajski, IEEE Visualization '96, pp.197-204.