@article{10_1017_S0017089500003554,
     author = {Lennox, John C.},
     title = {Lower central depth in finitely generated soluble-by-finite groups},
     journal = {Glasgow mathematical journal},
     pages = {153--154},
     year = {1978},
     volume = {19},
     number = {2},
     doi = {10.1017/S0017089500003554},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003554/}
}