@article{MZ_1982__181_173256,
     author = {Daniel R. Farkas},
     title = {Endomorphisms of {Polycyclic} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {567--574},
     year = {1982},
     volume = {181},
     zbl = {0495.20014},
     url = {http://geodesic.mathdoc.fr/item/MZ_1982__181_173256/}
}