Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1967__172_161574, author = {M.A. Kaashoek}, title = {Ascent, {Descent,} {Nullity} and {Defect,} a {Note} on a {Paper} by {A.E.} {Taylor}}, journal = {Mathematische Annalen}, pages = {105--115}, publisher = {mathdoc}, volume = {172}, year = {1967}, zbl = {0152.33803}, url = {http://geodesic.mathdoc.fr/item/MAN_1967__172_161574/} }
M.A. Kaashoek. Ascent, Descent, Nullity and Defect, a Note on a Paper by A.E. Taylor. Mathematische Annalen, Tome 172 (1967), pp. 105-115. http://geodesic.mathdoc.fr/item/MAN_1967__172_161574/