Tanmoy Kanti Das Subhamoy Maitra Cryptanalysis of "Wavelet Tree Quantization" Watermarking Scheme. 219-230 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3326&spage=219 2004 conf/iwdc/2004 IWDC db/conf/iwdc/iwdc2004.html#DasM04