@InProceedings{,
 author = {R. Dyja , A. Jakubski},
 booktitle = {IT Tools in Management and Education. Selected Problems. Ed. by Leszek Kiełtyka},
 title = {Steganography in Digital Multimedia},
 pages = {146--154},
 year = {2011},
 publisher = {Wydawnictwo PCz}
 }