@article{10_1017_S2040618500035280,
     author = {Allenby, R. B. J. T.},
     title = {Adjunction of roots to nilpotent groups},
     journal = {Glasgow mathematical journal},
     pages = {109--118},
     year = {1966},
     volume = {7},
     number = {3},
     doi = {10.1017/S2040618500035280},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S2040618500035280/}
}