@article{CMH_1968__43_139373,
     author = {H. Gross},
     title = {\"Uber isometrische {Abbildungen} in abz\"ahlbarer dimensionalen {R\"aumen} \"uber reellen {K\"orpern.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {348--357},
     publisher = {mathdoc},
     volume = {43},
     year = {1968},
     zbl = {0172.06301},
     url = {http://geodesic.mathdoc.fr/item/CMH_1968__43_139373/}
}