Mikhail J. Atallah Victor Raskin Christian Hempelmann Mercan Karahan Radu Sion Umut Topkara Katrina E. Triezenberg Natural Language Watermarking and Tamperproofing. 196-212 2002 conf/ih/2002 Information Hiding http://link.springer.de/link/service/series/0558/bibs/2578/25780196.htm db/conf/ih/ih2002.html#AtallahRHKSTT02