Rodrigo de Souza. 2017.
 On intrinsically ambiguous rational relations. In <em>Proceedings of the 2nd Theory of Computation Meeting</em>, July 02, 2017, São Paulo, Brasil. SBC, Porto Alegre, Brasil, 120-123. DOI: <a href="https://doi.org/10.5753/etc.2017.3207">https://doi.org/10.5753/etc.2017.3207</a>.