@article{amidei2016trial2,
  title={Trial and error mathematics II: Dialectical sets and quasidialectical sets, their degrees, and their distribution within the class of limit sets},
  author={Amidei, Jacopo and Pianigiani, Duccio and San Mauro, Luca and Sorbi, Andrea},
  journal={The Review of Symbolic Logic},
  volume={9},
  number={4},
  pages={810--835},
  year={2016},
  publisher={Cambridge University Press}
}