Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
,On the Number of Negative Eigenvalues of a Schroedinger Operator with Point Interactions,"Letters in Mathematical Physics 85, (2-3)",,,2008,,,1573-1530,https://cir.nii.ac.jp/crid/1010000782043823500,