IbarraS75'

BibTeX

@article{DBLP:journals/jcss/IbarraS75,
  author    = {Oscar H. Ibarra and
               Sartaj Sahni},
  title     = {Hierarchies of Turing Machines with Restricted Tape Alphabet
               Size},
  journal   = {J. Comput. Syst. Sci.},
  volume    = {11},
  number    = {1},
  year      = {1975},
  pages     = {56-67},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}