+@article{BDCC16,
+year={2015},
+journal={Multimedia Tools and Applications},
+title={Blind digital watermarking in PDF documents using Spread Transform Dither Modulation.},
+publisher={Springer US},
+author={Bitar, Ahmad and Darazi, Rony and Couchot, Jean-François and
+Couturier, Raphaël},
+note={to appear},
+}
+
+
+