@article{05237083, title = {The Atkinson theorem in Hilbert }, journal = {Abstract and Applied Analysis}, volume = {2007}, year = {2007}, doi = {10.1155/2007/53060}, zbl = {1155.46026}, language = {en}, url = {http://dml.mathdoc.fr/item/05237083} }
Niknam, A.; Sharifi, K. The Atkinson theorem in Hilbert . Abstract and Applied Analysis, Tome 2007 (2007) . doi : 10.1155/2007/53060. http://gdmltest.u-ga.fr/item/05237083/