@article{oai:repository.dl.itc.u-tokyo.ac.jp:00041079,
 author = {Sawashima, Ikuko},
 journal = {Scientific papers of the College of General Education, University of Tokyo},
 month = {},
 note = {application/pdf},
 pages = {181--182},
 title = {Some Counter Examples in the Theory of Positive Operetors},
 volume = {14},
 year = {1964}
}