@article{03764247, title = {On the differentiability of T(r,f).}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {5}, year = {1982}, pages = {351-356}, doi = {10.1155/S0161171282000337}, zbl = {0486.30021}, language = {en}, url = {http://dml.mathdoc.fr/item/03764247} }
Townsend, Douglas W. On the differentiability of T(r,f).. International Journal of Mathematics and Mathematical Sciences, Tome 5 (1982) pp. 351-356. doi : 10.1155/S0161171282000337. http://gdmltest.u-ga.fr/item/03764247/