@article{ASENS_2017__50_5_1081_0,
     author = {Alm, Johan and Petersen, Dan},
     title = {Brown's dihedral moduli space and freedom of the gravity operad},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {1081--1122},
     publisher = {Soci\'et\'e Math\'ematique de France. Tous droits r\'eserv\'es},
     volume = {Ser. 4, 50},
     number = {5},
     year = {2017},
     doi = {10.24033/asens.2340},
     mrnumber = {3720025},
     zbl = {1401.14139},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.2340/}
}