@article{MET_1983__30_175905,
     author = {S. Schach and M. Schumacher},
     title = {Approximation von entarteten linearen {Modellen} durch {Modelle} mit vollem {Rang.}},
     journal = {Metrika},
     pages = {171--178},
     publisher = {mathdoc},
     volume = {30},
     year = {1983},
     zbl = {0514.62075},
     url = {http://geodesic.mathdoc.fr/item/MET_1983__30_175905/}
}