@article{GDZPPN00235764X,
title = {Generalized classes of groups, C-nilpotent spaces and "The Hurewicz theorem".},
journal = {Mathematica Scandinavica},
volume = {53},
year = {1983},
pages = {39-61},
zbl = {0513.55010},
url = {http://dml.mathdoc.fr/item/GDZPPN00235764X}
}
Goncalves, Daciberg Lima. Generalized classes of groups, C-nilpotent spaces and "The Hurewicz theorem".. Mathematica Scandinavica, Tome 53 (1983) pp. 39-61. http://gdmltest.u-ga.fr/item/GDZPPN00235764X/