F. Mokhatarian,
S. Abbasi, and
J. Kittler.
Efficient and Robust Retrieval by Shape Content
through Curvature Scale Space.
In Images Databases and Multi-Media Search,
volume 8 of Series on Software Engineering and Knowledge
Engineering - A.W.M. Smeulders, R. Jain,
pages 51--58
.
World Scientific,
1997.
(bibtex entry)