@Inproceedings{EPTCS223.1,
  author    = {Michalewski, Henryk and Mio, Matteo and Boja\'nczyk, Miko{\l}aj},
  year      = {2016},
  title     = {On the Regular Emptiness Problem of Subzero Automata},
  editor    = {Bartoletti, Massimo and Henrio, Ludovic and Knight, Sophia and Torres Vieira, Hugo},
  booktitle = {{\rm Proceedings 9th}
               Interaction and Concurrency Experience,
               {\rm Heraklion, Greece, 8-9 June 2016}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {223},
  publisher = {Open Publishing Association},
  pages     = {1-23},
  doi       = {10.4204/EPTCS.223.1},
}