@article{MAN_1972__198_162304,
     author = {J\"orn Lembcke},
     title = {Gemeinsame {Urbilder} endlich additiver {Inhalte.}},
     journal = {Mathematische Annalen},
     pages = {239--258},
     year = {1972},
     volume = {198},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1972__198_162304/}
}