@article{MAN_1974__210_162604,
     author = {G\"unther Haugner and Wolfgang Zimmermann},
     title = {Dichte {Ringe*}},
     journal = {Mathematische Annalen},
     pages = {1--6},
     publisher = {mathdoc},
     volume = {210},
     year = {1974},
     url = {http://geodesic.mathdoc.fr/item/MAN_1974__210_162604/}
}