@article{MZ_1983__184_173347,
     author = {Bertram A.F. Wehrfritz},
     title = {Endomorphism of {Polycyclic} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {97--100},
     publisher = {mathdoc},
     volume = {184},
     year = {1983},
     zbl = {0502.20018},
     url = {http://geodesic.mathdoc.fr/item/MZ_1983__184_173347/}
}