Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1949__53_176819, author = {F.V. Atkinson}, title = {Symmetric {Linear} {Operators} on a {Banach} {Space.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {278--297}, publisher = {mathdoc}, volume = {53}, year = {1949}, zbl = {0035.35901}, url = {http://geodesic.mathdoc.fr/item/MOMA_1949__53_176819/} }
F.V. Atkinson. Symmetric Linear Operators on a Banach Space.. Monatshefte für Mathematik, Tome 53 (1949), pp. 278-297. http://geodesic.mathdoc.fr/item/MOMA_1949__53_176819/