Robust MPEG Video Watermarking Technologies. - Jana Dittmann; Mark Stabenau; Ralf Steinmetz (ACM Multimedia, 1998)

Combining digital watermarks and collusion-secure fingerprints for digital images. - Jana Dittmann; Alexander Behr; Mark Stabenau; Peter Schmitt; Jörg Schwenk; Johannes Ueberberg (Security and Watermarking of Multimedia Contents, 1999)