@article{DAS_2018_a4,
     author = {Romain Tessera and Matthew Tointon},
     title = {Properness of nilprogressions and the persistence of polynomial growth of given degree},
     journal = {Discrete analysis},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DAS_2018_a4/}
}