@article{MET_1967__12_175357,
     author = {J. Roppert},
     title = {Der {G\"odelsche} {Beweis} {(Nagel,} {E.und} {J.R.Newman)}},
     journal = {Metrika},
     pages = {238--238},
     publisher = {mathdoc},
     volume = {12},
     year = {1967},
     url = {http://geodesic.mathdoc.fr/item/MET_1967__12_175357/}
}