Phase watermarking of digital images. - J. J. K. O. Ruanaidh; W. J. Dowling; Francis M. Boland (ICIP (3), 1996)

Embedding Data in Digital Images Using CDMA Techniques. - Guenole C. M. Silvestre; W. J. Dowling (ICIP, 2000)

Informed audio watermarking scheme using digital chaotic signals. - Guenole C. M. Silvestre; Neil J. Hurley; G. S. Hanau; W. J. Dowling (ICASSP, 2001)