@article{MAN_1981__258_163575,
     author = {Marek Bozejko},
     title = {Remark on {Herz-Schur} {Multipliers} on {Free} {Groups.}},
     journal = {Mathematische Annalen},
     pages = {11--16},
     publisher = {mathdoc},
     volume = {258},
     year = {1981},
     zbl = {0483.43004},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__258_163575/}
}