F. Kolberg, M. Groshaus, A. Guedes, and R. Carmo.
" Results on Circular-Arc Bigraphs", in <em>Anais do I Encontro de Teoria da Computação</em>, Porto Alegre, 2016, pp. 864-867, doi: <a href="https://doi.org/10.5753/etc.2016.9846">https://doi.org/10.5753/etc.2016.9846</a>.