@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039833,
 author = {Yoshikawa, Atsushi},
 issue = {3},
 journal = {Journal of the Faculty of Science, the University of Tokyo. Sect. 1 A, Mathematics = 東京大学理学部紀要. 第1類A, 数学},
 month = {Dec},
 note = {application/pdf},
 pages = {559--566},
 title = {An operator theoretical remark on the Hardy-Littlewood-Sobolev inequality},
 volume = {17},
 year = {1970}
}