Arnaud de Mesmay, Yo'av Rieck, Eric Sedgwick, Martin Tancer. 3 is NP-hard. Journal of the ACM, 67(4), 2020. [doi]
@article{MesmayRST20, title = {3 is NP-hard}, author = {Arnaud de Mesmay and Yo'av Rieck and Eric Sedgwick and Martin Tancer}, year = {2020}, url = {https://dl.acm.org/doi/10.1145/3396593}, researchr = {https://researchr.org/publication/MesmayRST20}, cites = {0}, citedby = {0}, journal = {Journal of the ACM}, volume = {67}, number = {4}, }