Marta Penas María J. Carreira Manuel G. Penedo Gabor Wavelets and Auto-organised Structures for Directional Primitive Extraction. 722-732 http://dx.doi.org/10.1007/978-3-540-44871-6_84 2003 conf/ibpria/2003 IbPRIA db/conf/ibpria/ibpria2003.html#PenasCP03