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

Secure Distribution of Watermarked Images for a Digital Library of Ancient Papers. - Christian Rauber; Joseph Ó Ruanaidh; Thierry Pun (ACM DL, 1997)

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