%0 Journal Article %A W. P. Odinets %T The G\^ateaux differential, and uniqueness of the extension of linear operators with perservation of the norm %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1973 %P 77-86 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1973_4_a9/ %G ru %F IVM_1973_4_a9