@article{bwmeta1.element.bwnjournal-article-doi-10_4064-bc75-0-25,
author = {Jaroslav Zem\'anek},
title = {Powers of operators},
journal = {Banach Center Publications},
volume = {75},
year = {2007},
pages = {327-328},
zbl = {1215.47007},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc75-0-25}
}
Jaroslav Zemánek. Powers of operators. Banach Center Publications, Tome 75 (2007) pp. 327-328. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc75-0-25/