@article{CMH_1968__43_139350,
     author = {Leon E. Mattics},
     title = {Quadratic {Spaces} of {Countable} {Dimension} over {Algebraic} {Number} {Fields.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {31--40},
     publisher = {mathdoc},
     volume = {43},
     year = {1968},
     zbl = {0164.05903},
     url = {http://geodesic.mathdoc.fr/item/CMH_1968__43_139350/}
}