Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
KOMATSU Hikosaburo,"Fractional powers of operators, III Negative powers",Journal of the Mathematical Society of Japan,00255645,The Mathematical Society of Japan,1969,21,2,205-220,https://cir.nii.ac.jp/crid/1390282680091328256,https://doi.org/10.2969/jmsj/02120205