@article{01716633, title = {Flett's mean value theorem in topological vector spaces.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {25}, year = {2001}, pages = {689-694}, doi = {10.1155/S016117120101078X}, zbl = {1006.58007}, language = {en}, url = {http://dml.mathdoc.fr/item/01716633} }
Powers, Robert C.; Riedel, Thomas; Sahoo, Prasanna K. Flett's mean value theorem in topological vector spaces.. International Journal of Mathematics and Mathematical Sciences, Tome 25 (2001) pp. 689-694. doi : 10.1155/S016117120101078X. http://gdmltest.u-ga.fr/item/01716633/