Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
Roger Penrose,Gravitational Collapse and Space-Time Singularities,Physical Review Letters,0031-9007,American Physical Society (APS),1965-01-18,14,3,57-59,https://cir.nii.ac.jp/crid/1362825894573584128,https://doi.org/10.1103/physrevlett.14.57