Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Asao Arai and Fumio Hiroshima,Ultra-Weak Time Operators of Schrödinger Operators,Annales Henri Poincaré,1424-0637,Springer Science and Business Media LLC,2017-05-24,18,9,2995-3033,https://cir.nii.ac.jp/crid/1360285706120082048,https://doi.org/10.1007/s00023-017-0586-x