@article{GT_2023_27_7_a2,
     author = {Norbury, Paul},
     title = {A new cohomology class on the moduli space of curves},
     journal = {Geometry & topology},
     pages = {2695--2761},
     publisher = {mathdoc},
     volume = {27},
     number = {7},
     year = {2023},
     doi = {10.2140/gt.2023.27.2695},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2023.27.2695/}
}