@article{03680513, title = {Smoothness properties of functions in }, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2}, year = {1979}, pages = {415-426}, doi = {10.1155/S0161171279000326}, zbl = {0436.46040}, language = {en}, url = {http://dml.mathdoc.fr/item/03680513} }
Wolf, Edwin. Smoothness properties of functions in . International Journal of Mathematics and Mathematical Sciences, Tome 2 (1979) pp. 415-426. doi : 10.1155/S0161171279000326. http://gdmltest.u-ga.fr/item/03680513/