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[Ryt03] Wojciech Rytter. Application of Lempel-Ziv Factorization to the Approximation of Grammar-Based Compression. Theoretical Computer Science 302(1-3):211-222. Elsevier, June 2003. 
@article{tcs302(1-3)-Ryt,
  author =              {Rytter, Wojciech},
  title =               {Application of {L}empel-{Z}iv Factorization to the
                         Approximation of Grammar-Based Compression},
  publisher =           {Elsevier},
  journal =             {Theoretical Computer Science},
  volume =              {302},
  number =              {1-3},
  pages =               {211-222},
  year =                {2003},
  month =               jun,
}
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