Lower Limits of Discrete Universal Denoising.

Krishnamurthy Viswanathan Erik Ordentlich Lower Limits of Discrete Universal Denoising. 1374-1386 2009 55 IEEE Transactions on Information Theory 3 http://dx.doi.org/10.1109/TIT.2008.2011429 db/journals/tit/tit55.html#ViswanathanO09