Xrysovalantis Kavousianos Emmanouil Kalligeros Dimitris Nikolos Optimal Selective Huffman Coding for Test-Data Compression. 1146-1152 2007 56 IEEE Trans. Computers 8 http://doi.ieeecomputersociety.org/10.1109/TC.2007.1057 db/journals/tc/tc56.html#KavousianosKN07