@article{SAF_1974-1975____A21_0,
     author = {Tomczak-Jaegermann, N.},
     title = {On the differentiability of the norm in trace classes $S_p$},
     journal = {S\'eminaire Maurey-Schwartz},
     note = {talk:22},
     pages = {1--8},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1974-1975},
     zbl = {0311.47007},
     language = {en},
     url = {http://www.numdam.org/item/SAF_1974-1975____A21_0/}
}