@article{10_4064_sm_38_1_271_276,
     author = {Joel Cohen},
     title = {A characterization of inner product spaces using absolutely 2-summing operators},
     journal = {Studia Mathematica},
     pages = {271--276},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {1970},
     doi = {10.4064/sm-38-1-271-276},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-38-1-271-276/}
}