@article{MZ_1961__75_169908,
     author = {Olaf Tamaschke},
     title = {Die {Kongruenzrelationen} im {Verband} der zug\"anglichen {Subnormalteiler.}},
     journal = {Mathematische Zeitschrift},
     pages = {115--126},
     publisher = {mathdoc},
     volume = {75},
     year = {1961},
     zbl = {0118.26801},
     url = {http://geodesic.mathdoc.fr/item/MZ_1961__75_169908/}
}