@Inproceedings{EPTCS3.14,
  author    = {Jir\'askov\'a, Galina and Okhotin, Alexander},
  year      = {2009},
  title     = {Nondeterministic State Complexity of Positional Addition},
  editor    = {Dassow, J\"urgen and Pighizzini, Giovanni and Truthe, Bianca},
  booktitle = {{\rm Proceedings Eleventh International Workshop on}
               Descriptional Complexity of Formal Systems,
               {\rm Magdeburg, Germany, July 6-9, 2009}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {3},
  publisher = {Open Publishing Association},
  pages     = {151-161},
  doi       = {10.4204/EPTCS.3.14},
}