@article{1259943308,
author = {KOMATSU, Hikosaburo},
title = {Fractional powers of operators, III Negative powers},
journal = {J. Math. Soc. Japan},
volume = {21},
number = {2},
year = {1969},
pages = { 205-220},
language = {en},
url = {http://dml.mathdoc.fr/item/1259943308}
}
KOMATSU, Hikosaburo. Fractional powers of operators, III Negative powers. J. Math. Soc. Japan, Tome 21 (1969) no. 2, pp. 205-220. http://gdmltest.u-ga.fr/item/1259943308/