L. Zatesko, R. Carmo, and A. Guedes.
" Edge-colouring of triangle-free graphs with no proper majors", in <em>Proceedings of the 2nd Theory of Computation Meeting</em>, São Paulo, 2017, pp. 17-20, doi: <a href="https://doi.org/10.5753/etc.2017.3181">https://doi.org/10.5753/etc.2017.3181</a>.