@inproceedings{cp-dcncb-17
, author =        "Colin~de Verdi{\`e}re, {\'E}ric and Parsa, Salman"
, title =         "Deciding contractibility of a non-simple curve on the
                   boundary of a 3-manifold"
, booktitle =     "Proceedings of the 28th Annual ACM-SIAM Symposium on
                   Discrete Algorithms (SODA)"
, year =          "2017"
, pages =         "2691--2704"
, note =          "Full version available at arXiv:2001.04747"
}