@article{05692319, title = {A version of Hilbert's 13th problem for infinitely differentiable functions.}, journal = {Fixed Point Theory and Applications [electronic only]}, volume = {2010}, year = {2010}, doi = {10.1155/2010/287647}, zbl = {1189.26026}, language = {en}, url = {http://dml.mathdoc.fr/item/05692319} }
Akashi, Shigeo; Kodama, Satoshi. A version of Hilbert's 13th problem for infinitely differentiable functions.. Fixed Point Theory and Applications [electronic only], Tome 2010 (2010) . doi : 10.1155/2010/287647. http://gdmltest.u-ga.fr/item/05692319/