Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1987__196_173874, author = {Giovanni Dore and Alberto Venni}, title = {On the {Closedness} of the {Sum} of {Two} {Closed} {Operators.}}, journal = {Mathematische Zeitschrift}, pages = {189--202}, publisher = {mathdoc}, volume = {196}, year = {1987}, zbl = {0615.47002}, url = {http://geodesic.mathdoc.fr/item/MZ_1987__196_173874/} }
Giovanni Dore; Alberto Venni. On the Closedness of the Sum of Two Closed Operators.. Mathematische Zeitschrift, Tome 196 (1987), pp. 189-202. http://geodesic.mathdoc.fr/item/MZ_1987__196_173874/