@article{1102970058, author = {Johnson, B. E.}, title = {Norms of derivations of ${\cal L}({\germ X})$.}, journal = {Pacific J. Math.}, volume = {39}, number = {3}, year = {1971}, pages = { 465-469}, language = {en}, url = {http://dml.mathdoc.fr/item/1102970058} }
Johnson, B. E. Norms of derivations of ${\cal L}({\germ X})$.. Pacific J. Math., Tome 39 (1971) no. 3, pp. 465-469. http://gdmltest.u-ga.fr/item/1102970058/