@article{1103035742, author = {Foguel, Shaul R.}, title = {Powers of a contraction in Hilbert space.}, journal = {Pacific J. Math.}, volume = {13}, number = {4}, year = {1963}, pages = { 551-562}, language = {en}, url = {http://dml.mathdoc.fr/item/1103035742} }
Foguel, Shaul R. Powers of a contraction in Hilbert space.. Pacific J. Math., Tome 13 (1963) no. 4, pp. 551-562. http://gdmltest.u-ga.fr/item/1103035742/