@article{PMIHES_2019__130__1_0,
     author = {Galatius, S{\o}ren and Kupers, Alexander and Randal-Williams, Oscar},
     title = {$E_{2}$-cells and mapping class groups},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {1--61},
     publisher = {Springer Berlin Heidelberg},
     address = {Berlin/Heidelberg},
     volume = {130},
     year = {2019},
     doi = {10.1007/s10240-019-00107-8},
     mrnumber = {4028513},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10240-019-00107-8/}
}