Universal entropy estimation via block sorting. - Haixiao Cai; Sanjeev R. Kulkarni; Sergio Verdú (IEEE Trans. Inf. Theory, 2004)

A universal lossless compressor with side information based on context tree weighting. - Haixiao Cai; Sanjeev R. Kulkarni; Sergio Verdú (ISIT, 2005)

Universal Divergence Estimation for Finite-Alphabet Sources. - Haixiao Cai; Sanjeev R. Kulkarni; Sergio Verdú (IEEE Trans. Inf. Theory, 2006)

An Algorithm for Universal Lossless Compression With Side Information. - Haixiao Cai; Sanjeev R. Kulkarni; Sergio Verdú (IEEE Trans. Inf. Theory, 2006)