@article{MS2_1983__53_166853,
     author = {Daciberg Lima Goncalves},
     title = {Generalized classes of groups, {C-nilpotent} spaces and },
     journal = {Mathematica Scandinavica},
     pages = {39--61},
     publisher = {mathdoc},
     volume = {53},
     year = {1983},
     zbl = {0513.55010},
     url = {http://geodesic.mathdoc.fr/item/MS2_1983__53_166853/}
}