@article{ASENS_2010_4_43_6_925_0,
     author = {Nicole, Marc-Hubert and Vasiu, Adrian and Wedhorn, Torsten},
     title = {Purity of level $m$ stratifications},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {925--955},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {Ser. 4, 43},
     number = {6},
     year = {2010},
     doi = {10.24033/asens.2136},
     mrnumber = {2778452},
     zbl = {1223.14052},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.2136/}
}