@article{MAN_1968__177_161715,
     author = {I. SZ\'ASZ-FELTEN},
     title = {\"Uber den {Absolutbetrag} von {Operatoren} in einem vektoriellen {L1-Raum.}},
     journal = {Mathematische Annalen},
     pages = {165--180},
     publisher = {mathdoc},
     volume = {177},
     year = {1968},
     zbl = {0182.47101},
     url = {http://geodesic.mathdoc.fr/item/MAN_1968__177_161715/}
}