@article{700849,
title = {\"Uber die Potenzen $A^\alpha $
$(0\le \alpha \le 1)$ eines abgeschlossenen Operators $A$ in einem Banachraum},
booktitle = {General Topology and its Relations to Modern Analysis and Algebra},
series = {GDML\_Books},
publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences},
address = {Praha},
year = {1967},
pages = {271-273},
mrnumber = {MR0232237},
zbl = {0165.15003},
url = {http://dml.mathdoc.fr/item/700849}
}
Nollau, V. Über die Potenzen $A^\alpha $
$(0\le \alpha \le 1)$ eines abgeschlossenen Operators $A$ in einem Banachraum, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books, (1967), pp. 271-273. http://gdmltest.u-ga.fr/item/700849/