@article{1102993838, author = {Komatsu, Hikosaburo}, title = {Fractional powers of operators.}, journal = {Pacific J. Math.}, volume = {19}, number = {3}, year = {1966}, pages = { 285-346}, language = {en}, url = {http://dml.mathdoc.fr/item/1102993838} }
Komatsu, Hikosaburo. Fractional powers of operators.. Pacific J. Math., Tome 19 (1966) no. 3, pp. 285-346. http://gdmltest.u-ga.fr/item/1102993838/