Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) M.W. Degroot and J.F. Corrigan,High Nuclearity Clusters: Metal–Chalcogenide Polynuclear Complexes,Comprehensive Coordination Chemistry II,,Elsevier,2003,,,57-123,https://cir.nii.ac.jp/crid/1363670320300047872,https://doi.org/10.1016/b0-08-043748-6/06147-8