@Inproceedings{EPTCS151.19,
  author    = {Holzer, Markus and Jakobi, Sebastian},
  year      = {2014},
  title     = {More Structural Characterizations of Some Subregular Language Families by Biautomata},
  editor    = {\'Esik, Zolt\'an and F\"ul\"op, Zolt\'an},
  booktitle = {{\rm Proceedings 14th International Conference on}
               Automata and Formal Languages,
               {\rm Szeged, Hungary, May 27-29, 2014}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {151},
  publisher = {Open Publishing Association},
  pages     = {271-285},
  doi       = {10.4204/EPTCS.151.19},
}