Marina Kolesnik Alexander Barlit Evgeny Zubkov Iterative Tuning of Simple Cells for Contrast Invariant Edge Enhancement. 27-37 2002 conf/bmcv/2002 Biologically Motivated Computer Vision http://link.springer.de/link/service/series/0558/bibs/2525/25250027.htm db/conf/bmcv/bmcv2002.html#KolesnikBZ02