Using Contextual Information for Image Retrieva. - Lee Gregory; Josef Kittler (ICIAP, 2001)

Using Graph Search Techniques for Contextual Colour Retrieval. - Lee Gregory; Josef Kittler (SSPR/SPR, 2002)

Using a pictorial dictionary as a high level user interface for visual information retrieval. - Lee Gregory; Josef Kittler (ICIP (2), 2003)