1. The orientation of apatite crystals in bone;Bacon;J. Appl. Crystallogr.,1979
2. S. Beucher and F. Meyer, The morphological approach to segmentation: The watershed transform, in Mathematical Morphology in Image ProcessingD. Dougherty, Ed., pp. 433–481, Dekker, New York, 1993.
3. Multidimensional orientation estimation with applications to texture analysis and optical flow;Bigun;IEEE Trans. Pattern Anal. Machine Intell.,1991
4. On contour and slope lines;Cayley;London, Edinburgh and Dublin Philos. Mag. J. Sci.,1859
5. A. Collignon, F. Maes, D. Delaere, D. Vandermeulen, P. Suetens, and G. Marchal, Automated multi-modality image registration based on information theory, in Information Processing in Medical ImagingY. Bizais, C. Barillot, and R. Di Paola, Eds., pp. 263–274, Kluwer Academic, Dordrecht, 1995.