This article's first reference is bogus and probably should be deleted.
Andrew Polar's "polar tree" and so called "Polar Coding" are not related. THe former one is basically a Huffman like symbol tree. The latter is Erdal Arikan's information theoretic construction.
See the wikipedia article http://en.wikipedia.org/wiki/User:Ajraymond/PolarCodes
Thus the Korada article refers to the "Polar Code" of Arikan
Korada, S.B.; Urbanke, R.L. "Polar Codes are Optimal for Lossy Source Coding". IEEE Transactions on Information Theory. April 2010
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