@article{MET_1972__19_175522,
     author = {H. Heyer},
     title = {Zum {Ersch\"opftheitsbegriff} von {D.} {BLACKWELL.}},
     journal = {Metrika},
     pages = {54--67},
     publisher = {mathdoc},
     volume = {19},
     year = {1972},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MET_1972__19_175522/}
}