@article{1102994125, author = {Caradus, S. R.}, title = {Operators with finite ascent and descent.}, journal = {Pacific J. Math.}, volume = {19}, number = {3}, year = {1966}, pages = { 437-449}, language = {en}, url = {http://dml.mathdoc.fr/item/1102994125} }
Caradus, S. R. Operators with finite ascent and descent.. Pacific J. Math., Tome 19 (1966) no. 3, pp. 437-449. http://gdmltest.u-ga.fr/item/1102994125/