@article{BSMF_2007__135_3_367_0,
     author = {Host, Bernard and Maass, Alejandro},
     title = {Nilsyst\`emes d'ordre 2 et parall\'el\'epip\`edes},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {367--405},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {135},
     number = {3},
     year = {2007},
     doi = {10.24033/bsmf.2539},
     mrnumber = {2430186},
     zbl = {1217.37010},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.2539/}
}