@article{10_4064_sm_38_1_277_278,
     author = {S. Kwapie\'n},
     title = {A linear topological characterization of inner-product spaces},
     journal = {Studia Mathematica},
     pages = {277--278},
     year = {1970},
     volume = {38},
     number = {1},
     doi = {10.4064/sm-38-1-277-278},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-38-1-277-278/}
}