@ARTICLE{cj05-01,
  AUTHOR = {Jakob Pagter},
  TITLE  = {On Ajtai's Lower Bound Technique for R-way Branching Programs and the Hamming Distance Problem},
  YEAR = {2005},
  JOURNAL = {Chicago Journal of Theoretical Computer Science},
    VOLUME = {2005},
NUMBER={1},
month={may},
year{2005}