@article{10_2140_agt_2024_24_4307, author = {Jaco, William and Hyam Rubinstein, Joachim and Spreer, Jonathan and Tillmann, Stephan}, title = {Slope norm and an algorithm to compute the crosscap number}, journal = {Algebraic and Geometric Topology}, pages = {4307--4351}, publisher = {mathdoc}, volume = {24}, number = {8}, year = {2024}, doi = {10.2140/agt.2024.24.4307}, url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2024.24.4307/} }