1. Broit C: Optimal registration of deformed images. PhD thesis, Computer and Information Science, University of Pensylvania, 1981.
2. Bajcsy R, Kovačič S: Multiresolution elastic matching. Computer Vision, Graphics and Image processing, 46:1–21, 1989.
3. Amit Y: A nonlinear variational problem for image matching. SIAM J. Sci. Comp., 15(1):207–224, 1994.
4. Christensen GE: Deformable shape models for anatomy. PhD thesis, Sever Institute of Technology, Washington University, 1994.
5. Bro-Nielsen M: Medical image registration and surgery simulation. PhD thesis, IMM, Technical University of Denmark, 1996.