@article{00942900, title = {Projections, extendability of operators and the G\^ateaux derivative of the norm.}, journal = {Journal of Applied Analysis}, volume = {1}, year = {1995}, pages = {29-38}, doi = {10.1515/JAA.1995.29}, zbl = {0864.46002}, language = {en}, url = {http://dml.mathdoc.fr/item/00942900} }
Gajek, L.; Jachymski, J.; Zagrodny, D. Projections, extendability of operators and the Gâteaux derivative of the norm.. Journal of Applied Analysis, Tome 1 (1995) pp. 29-38. doi : 10.1515/JAA.1995.29. http://gdmltest.u-ga.fr/item/00942900/