Archival and retrieval of historical watermark images. - Christian Rauber; Peter Tschudin; Sergei Startchik; Thierry Pun (ICIP (2), 1996)

Projective and illumination invariant representation of disjoint shapes. - Sergei Startchik; Ruggero Milanese; Thierry Pun (Image Vis. Comput., 1998)

Geometric and illumination invariant object representation: application to to content-based image retrieval. - Sergei Startchik (1998)

Planar Shape Databases with Affine Invariant Search. - Sergei Startchik; Ruggero Milanese; Christian Rauber; Thierry Pun (Image Databases and Multi-Media Search, 1998)