@article{MM2_1995__86_3_156051,
     author = {Alexander Prestel},
     title = {On {Sol\`er's} characterization of {Hilbert} spaces.},
     journal = {Manuscripta mathematica},
     pages = {225--238},
     publisher = {mathdoc},
     volume = {86},
     number = {3},
     year = {1995},
     zbl = {0830.46016},
     url = {http://geodesic.mathdoc.fr/item/MM2_1995__86_3_156051/}
}