@article{CMH_1970__45_139451,
     author = {H. Gross},
     title = {Eine {Bemerkung} zu dichten {Unterr\"aumen} reeller quadratischer {R\"aume.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {472--493},
     publisher = {mathdoc},
     volume = {45},
     year = {1970},
     zbl = {0287.15009},
     url = {http://geodesic.mathdoc.fr/item/CMH_1970__45_139451/}
}