TY  - JOUR
AU  - S. Heinrich
TI  - The differentiability of the norm in spaces of operators
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1975
SP  - 93
EP  - 94
VL  - 9
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1975_9_4_a24/
LA  - ru
ID  - FAA_1975_9_4_a24
ER  -