著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Fumio Hiroshima,Multiplicity of ground states in quantum field models: applications of asymptotic fields,Journal of Functional Analysis,0022-1236,Elsevier BV,2005-07,224,2,431-470,https://cir.nii.ac.jp/crid/1363107369323453440,https://doi.org/10.1016/j.jfa.2005.03.004