@article{10_4171_ggd_112,
     author = {Victor M. Petrogradsky and Ivan P. Shestakov and Efim Zelmanov},
     title = {Nil graded self-similar algebras},
     journal = {Groups, geometry, and dynamics},
     pages = {873--900},
     year = {2010},
     volume = {4},
     number = {4},
     doi = {10.4171/ggd/112},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/112/}
}