@article{SAF_1972-1973____A8_0,
     author = {Kwapien, S.},
     title = {Isomorphic characterizations of {Hilbert} spaces by orthogonal series with vector valued coefficients},
     journal = {S\'eminaire Maurey-Schwartz},
     note = {talk:8},
     pages = {1--7},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1972-1973},
     mrnumber = {410345},
     zbl = {0263.46020},
     language = {en},
     url = {http://archive.numdam.org/item/SAF_1972-1973____A8_0/}
}