Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) FRATTINI MG,In vitro synthesis of oncogenic human papillomaviruses requires episomal genomes for differentiation-dependent late expression,Proc Natl Acad Sci USA,,,1996,93,,3062-3067,https://cir.nii.ac.jp/crid/1570291226763285376,